/* ============================================
   Honstech 瀚斯特科技 — 官网样式系统
   风格：浅蓝主调 / 玻璃拟态 / 2.5D几何 / 粒子背景
   ============================================ */

:root {
  /* 品牌色板 */
  --c-blue-50:  #EFF5FF;
  --c-blue-100: #DCE8FE;
  --c-blue-200: #B5CFFE;
  --c-blue-300: #85AEFC;
  --c-blue-400: #5B8FF9;
  --c-blue-500: #3B6FF0;
  --c-blue-600: #2A4FE0;
  --c-blue-700: #1F3CB8;
  --c-blue-800: #142C8A;
  --c-blue-900: #0A1A5C;

  --c-cyan-300: #67E8F9;
  --c-cyan-400: #22D3EE;
  --c-cyan-500: #06B6D4;

  --c-ink-900: #06112B;
  --c-ink-800: #0A1A3D;
  --c-ink-700: #14264F;
  --c-ink-600: #2A3A66;
  --c-ink-500: #5A6A8C;
  --c-ink-400: #8A98B8;
  --c-ink-300: #B8C0D8;
  --c-ink-200: #DCE2EE;
  --c-ink-100: #EEF1F8;
  --c-ink-50:  #F6F8FC;

  --c-bg:      #F2F6FE;
  --c-bg-card: #FFFFFF;
  --c-glass:   rgba(255, 255, 255, 0.55);
  --c-glass-strong: rgba(255, 255, 255, 0.75);

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-full: 999px;

  /* 阴影 */
  --sh-soft:    0 4px 20px -6px rgba(31, 60, 184, 0.10), 0 2px 8px -3px rgba(31, 60, 184, 0.06);
  --sh-card:    0 12px 40px -12px rgba(31, 60, 184, 0.18), 0 4px 12px -4px rgba(31, 60, 184, 0.08);
  --sh-hover:   0 20px 60px -12px rgba(31, 60, 184, 0.28), 0 6px 18px -6px rgba(31, 60, 184, 0.12);
  --sh-glow:    0 0 80px -10px rgba(91, 143, 249, 0.45);

  /* 间距 */
  --container: 1280px;
  --gutter: 32px;

  /* 视觉画框：列表卡片封面与详情页顶图共用同一宽高比，
     一张图在两处呈现完全一致，不会被裁切。改这一处即可全局生效。 */
  --visual-ratio: 16 / 9;

  /* 字体 */
  --font-sans: -apple-system, BlinkMacSystemFont, "Inter", "PingFang SC",
               "Helvetica Neue", "Microsoft YaHei", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--c-bg);
  color: var(--c-ink-800);
  line-height: 1.6;
  letter-spacing: -0.005em;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* ============ 背景层 ============ */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -10;
  pointer-events: none;
  overflow: hidden;
}

.bg-layer .gradient-mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(ellipse 60% 50% at 18% 12%, rgba(91, 143, 249, 0.28), transparent 60%),
    radial-gradient(ellipse 50% 50% at 82% 28%, rgba(103, 232, 249, 0.22), transparent 60%),
    radial-gradient(ellipse 50% 60% at 50% 88%, rgba(184, 207, 255, 0.30), transparent 65%),
    radial-gradient(ellipse 40% 40% at 90% 80%, rgba(31, 60, 184, 0.10), transparent 60%);
  filter: blur(20px);
  animation: meshDrift 22s ease-in-out infinite alternate;
}

@keyframes meshDrift {
  0%   { transform: translate3d(0, 0, 0) rotate(0deg); }
  50%  { transform: translate3d(-2%, 1%, 0) rotate(0.5deg); }
  100% { transform: translate3d(2%, -1%, 0) rotate(-0.5deg); }
}

.bg-layer .grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(91, 143, 249, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 143, 249, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  opacity: 0.6;
}

#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: -8;
  pointer-events: none;
}

.bg-layer .noise-overlay {
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/></filter><rect width='200' height='200' filter='url(%23n)' opacity='0.5'/></svg>");
  opacity: 0.04;
  mix-blend-mode: multiply;
}

//* ============ 排版 ============ */
h1, h2, h3, h4 {
  color: var(--c-ink-900);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

h1 { font-size: clamp(2.6rem, 5.2vw, 4.6rem); font-weight: 700; }
h2 { font-size: clamp(2rem, 3.6vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2vw, 1.6rem); }
h4 { font-size: 1.15rem; }

p { color: var(--c-ink-600); font-size: 1.02rem; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  /* 作为 flex/grid 子项时允许收缩到可用宽度：
     否则内部宽轨道（如 hero 的 marquee-track，min-content 2817px）
     会把容器最小宽度撑爆，移动端整块横向溢出被裁剪 */
  min-width: 0;
}

.section {
  padding: clamp(80px, 12vh, 140px) 0;
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--r-full);
  background: var(--c-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(91, 143, 249, 0.18);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--c-blue-700);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.eyebrow .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-blue-500);
  box-shadow: 0 0 12px var(--c-blue-400);
}

.section-title {
  margin-top: 18px;
  max-width: 780px;
  /* 窄屏换行时均衡分配每行字数，避免「一个字单独占一行」 */
  text-wrap: balance;
}

/* 客户区标题较长，放开限宽避免被动折行 */
.clients-section .section-title { max-width: 1020px; }

.section-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--c-blue-500) 0%, var(--c-cyan-500) 60%, var(--c-blue-700) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-sub {
  margin-top: 18px;
  max-width: 640px;
  font-size: 1.08rem;
  color: var(--c-ink-500);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--r-md);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: all 0.25s cubic-bezier(.4,0,.2,1);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--c-blue-500) 0%, var(--c-blue-600) 100%);
  color: white;
  box-shadow: 0 8px 24px -8px rgba(59, 111, 240, 0.5),
              inset 0 1px 0 rgba(255,255,255,0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -8px rgba(59, 111, 240, 0.6),
              inset 0 1px 0 rgba(255,255,255,0.3);
}

.btn-ghost {
  background: var(--c-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(91, 143, 249, 0.22);
  color: var(--c-blue-700);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.85);
  border-color: rgba(91, 143, 249, 0.4);
}

.btn .arrow {
  transition: transform 0.25s ease;
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ============================================
   品牌装配加载页 · Honstech
   概念：H 字形描边装配 → 字母逐个装配 → 双幕分开
   ============================================ */

html.is-loading, html.is-loading body { overflow: hidden; }

.loader {
  position: fixed;
  inset: 0;
  z-index: 999;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.loader.gone { display: none; }

/* ---------- 双幕背景 ---------- */
.loader-shutter {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: 1fr 1fr;
}
.shutter { position: relative; will-change: transform; }
.shutter-t { background: linear-gradient(180deg, #FFFFFF 0%, #F2F6FE 100%); }
.shutter-b { background: linear-gradient(0deg,   #FFFFFF 0%, #F2F6FE 100%); }

.shutter::after {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(91, 143, 249, .11) 1px, transparent 1px),
    linear-gradient(90deg, rgba(91, 143, 249, .11) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: .5;
  -webkit-mask-image: radial-gradient(ellipse 75% 130% at 50% 50%, #000 25%, transparent 80%);
          mask-image: radial-gradient(ellipse 75% 130% at 50% 50%, #000 25%, transparent 80%);
}

/* ---------- 中央：品牌 Logo 揭示 ---------- */
.loader-body {
  position: relative;
  z-index: 3;
  display: grid;
  justify-items: center;
  gap: 26px;
  margin-bottom: 16px;
}

.loader-mark {
  position: relative;
  /* Logo 原图 290×70 为横向比例：宽度自适应，高度 auto，任何视口下都不会拉伸变形 */
  width: clamp(180px, 24vw, 272px);
  display: grid;
  place-items: center;
}

/* 背景光晕：横向椭圆，跟随 Logo 呼吸 */
.mark-halo {
  position: absolute;
  inset: -46% -18%;
  border-radius: 50%;
  background: radial-gradient(ellipse at center,
    rgba(91, 143, 249, .30) 0%, rgba(103, 232, 249, .12) 52%, transparent 72%);
  filter: blur(16px);
  animation: haloPulse 2.6s ease-in-out infinite;
}
@keyframes haloPulse {
  0%, 100% { opacity: .45; transform: scale(.95); }
  50%      { opacity: 1;   transform: scale(1.06); }
}

/* 画框：承载 Logo 与扫光，溢出隐藏以约束高光条 */
.mark-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
}

/* 真实 Logo：淡入 + 轻微上浮缩放 + 品牌投影 */
.mark-logo {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  opacity: 0;
  transform: translateY(9px) scale(.965);
  filter: drop-shadow(0 8px 22px rgba(37, 99, 235, .16));
  animation: logoIn .82s cubic-bezier(.2, .85, .25, 1) .14s forwards;
}
@keyframes logoIn {
  to { opacity: 1; transform: none; }
}

/* 一道高光斜扫过 Logo，制造「装配完成」的质感 */
.mark-sweep {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg,
    transparent 34%,
    rgba(255, 255, 255, .92) 47%,
    rgba(103, 232, 249, .5) 53%,
    transparent 66%);
  transform: translateX(-125%);
  animation: logoSweep 1.25s cubic-bezier(.28, .1, .24, 1) .6s forwards;
}
@keyframes logoSweep { to { transform: translateX(125%); } }

/* Logo 下方品牌渐变细线，由中心向两侧展开 */
.mark-line {
  position: absolute;
  left: 50%;
  bottom: -16px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent 0%,
    var(--c-blue-400) 22%, var(--c-cyan-500) 50%, var(--c-blue-400) 78%, transparent 100%);
  animation: lineGrow .95s cubic-bezier(.65, 0, .35, 1) .95s forwards;
}
@keyframes lineGrow { to { width: 100%; } }

.loader-sub {
  font-family: var(--font-mono);
  font-size: clamp(.56rem, 1.4vw, .7rem);
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--c-ink-500);
  padding-left: .32em;
  opacity: 0;
  animation: fadeUp .7s ease .92s forwards;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- 底部进度 ---------- */
.loader-foot {
  position: absolute;
  z-index: 3;
  left: 0; right: 0; bottom: 0;
  padding: 0 clamp(22px, 5vw, 64px) clamp(26px, 5vh, 52px);
  display: flex;
  align-items: center;
  gap: 16px;
  opacity: 0;
  animation: fadeUp .6s ease .45s forwards;
}
.loader-status {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-ink-500);
  min-width: 104px;
  white-space: nowrap;
}
.loader-track {
  flex: 1;
  height: 2px;
  border-radius: 2px;
  background: rgba(31, 60, 184, .14);
  overflow: hidden;
}
.loader-bar {
  position: relative;
  height: 100%;
  width: 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 0 14px rgba(91, 143, 249, .6);
}
.loader-bar::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; right: 0;
  width: 36px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .85));
}
.loader-pct {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--c-ink-600);
  font-variant-numeric: tabular-nums;
  min-width: 42px;
  text-align: right;
}

/* ---------- 扫描线 / 中缝光 ---------- */
.loader-scan {
  position: absolute;
  z-index: 4;
  left: 0; right: 0; top: 0;
  height: 180px;
  pointer-events: none;
  background: linear-gradient(180deg, transparent, rgba(91, 143, 249, .12) 50%, transparent);
  animation: scanRun 1.9s cubic-bezier(.5, 0, .5, 1) forwards;
}
@keyframes scanRun {
  from { transform: translateY(-200px); }
  to   { transform: translateY(102vh); }
}

.loader-seam {
  position: absolute;
  z-index: 5;
  top: 50%; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-blue-400) 30%, var(--c-cyan-400) 70%, transparent);
  opacity: 0;
  transform: scaleX(0);
}
.loader.done .loader-seam { animation: seamFlash .9s cubic-bezier(.4, 0, .2, 1) .26s forwards; }
@keyframes seamFlash {
  0%   { opacity: 0; transform: scaleX(0); }
  30%  { opacity: 1; transform: scaleX(1); }
  100% { opacity: 0; transform: scaleX(1); }
}

/* ---------- 退场 ---------- */
.loader.done .loader-body { animation: liftOut .38s cubic-bezier(.4, 0, .2, 1) forwards; }
.loader.done .loader-foot { animation: liftOut .3s ease forwards; }
@keyframes liftOut {
  to { opacity: 0; transform: translateY(-18px); }
}
.loader.done .loader-scan { display: none; }
.loader.done .shutter-t { animation: shutterUp   .8s cubic-bezier(.76, 0, .24, 1) .28s forwards; }
.loader.done .shutter-b { animation: shutterDown .8s cubic-bezier(.76, 0, .24, 1) .28s forwards; }
@keyframes shutterUp   { to { transform: translateY(-100%); } }
@keyframes shutterDown { to { transform: translateY(100%);  } }


/* ============================================
   Studio Rail · 导轨式导航
   形态：滚动驱动 --sp（0→1）连续形变，非离散三态
   交互：① 滑动指示胶囊 ② 整条光标辉光 ③ 磁吸位移
        ④ 聚焦变暗 ⑤ 悬停预览卡 ⑥ Scrollspy ⑦ 品牌时钟
   ============================================ */

.nav {
  --sp: 0;                          /* 滚动形变进度，JS 写入 */
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: calc(16px - var(--sp) * 5px) 16px 0;
  pointer-events: none;             /* 只让导轨本体接收事件 */
  transition: transform .55s cubic-bezier(.4, 0, .2, 1), opacity .35s ease;
}

.nav[data-state="hidden"] {
  transform: translateY(-170%);
  opacity: 0;
}

/* ---------- 顶部阅读进度线 ---------- */
.nav-progress-track {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 2px;
  z-index: 101;
  pointer-events: none;
}

.nav-progress-bar {
  height: 100%;
  width: 0;
  border-radius: 0 2px 2px 0;
  background: linear-gradient(90deg, var(--c-blue-500) 0%, var(--c-cyan-500) 100%);
  box-shadow: 0 0 12px rgba(91, 143, 249, .65);
  transition: width .1s linear;
}

/* ---------- 导轨本体 ---------- */
.nav-rail {
  pointer-events: auto;
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  width: 100%;
  max-width: calc(1240px - var(--sp) * 92px);
  padding: calc(8px - var(--sp) * 1.5px) 10px;
  border-radius: var(--r-full);
  overflow: hidden;                 /* 让辉光贴合胶囊轮廓 */
  background: rgba(255, 255, 255, calc(.56 + var(--sp) * .30));
  backdrop-filter: blur(calc(20px + var(--sp) * 14px)) saturate(180%);
  -webkit-backdrop-filter: blur(calc(20px + var(--sp) * 14px)) saturate(180%);
  border: 1px solid rgba(255, 255, 255, calc(.72 + var(--sp) * .18));
  box-shadow: 0 10px 34px -14px rgba(31, 60, 184, calc(.18 + var(--sp) * .22)),
              0 2px 8px -4px rgba(31, 60, 184, .08),
              inset 0 1px 0 rgba(255, 255, 255, .55);
  transform: translate3d(var(--mx, 0px), var(--my, 0px), 0);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease,
              max-width .45s cubic-bezier(.4, 0, .2, 1);
  will-change: transform;
}

/* 加载结束后的入场（不影响 hidden 状态的 transform） */
.nav.is-in .nav-rail { animation: railIn .9s cubic-bezier(.2, .85, .25, 1) backwards; }
@keyframes railIn {
  from { opacity: 0; transform: translate3d(var(--mx, 0px), calc(var(--my, 0px) - 26px), 0) scale(.97); }
  to   { opacity: 1; transform: translate3d(var(--mx, 0px), var(--my, 0px), 0) scale(1); }
}

/* 整条导轨的光标辉光 */
.rail-glow {
  position: absolute;
  top: 0; left: 0;
  width: 340px; height: 340px;
  margin: -170px 0 0 -170px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  background: radial-gradient(circle,
    rgba(91, 143, 249, .30) 0%,
    rgba(103, 232, 249, .12) 40%,
    transparent 70%);
  opacity: 0;
  transform: translate3d(var(--gx, 0px), var(--gy, 0px), 0);
  transition: opacity .4s ease;
  will-change: transform;
}
.nav-rail:hover .rail-glow { opacity: 1; }

/* 顶部高光发丝线 */
.rail-hair {
  position: absolute;
  z-index: 1;
  top: 0; left: 14%; right: 14%;
  height: 1px;
  pointer-events: none;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .95), transparent);
}

/* ---------- 段 1 · 品牌 ---------- */
.rail-brand {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 9px;
  flex: none;
  padding: 4px 12px 4px 4px;
  text-decoration: none;
  font-weight: 700;
  font-size: calc(1.02rem - var(--sp) * .05rem);
  letter-spacing: -0.025em;
  color: var(--c-ink-900);
  border-radius: var(--r-full);
}

.brand-mark {
  width: calc(30px - var(--sp) * 2px);
  height: calc(30px - var(--sp) * 2px);
  border-radius: 9px;
  background: linear-gradient(135deg, var(--c-blue-500) 0%, var(--c-cyan-500) 100%);
  display: grid; place-items: center;
  color: #fff; font-weight: 700; font-size: .95rem;
  box-shadow: 0 4px 12px -2px rgba(59, 111, 240, .45);
  position: relative; overflow: hidden;
  flex: none;
}

.brand-mark::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, .45) 50%, transparent 60%);
  animation: brandShine 4s ease-in-out infinite;
}
@keyframes brandShine {
  0%, 100% { transform: translateX(-100%); }
  50%      { transform: translateX(100%); }
}

.brand-word {
  background: linear-gradient(120deg, var(--c-blue-600) 0%, var(--c-blue-400) 40%, var(--c-cyan-500) 75%, var(--c-blue-700) 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
  white-space: nowrap;
  transition: background-position .8s ease;
}
.rail-brand:hover .brand-word { background-position: 100% 0; }

/* ---------- 分隔线 ---------- */
.rail-sep {
  position: relative;
  z-index: 1;
  flex: none;
  width: 1px;
  height: calc(24px - var(--sp) * 4px);
  background: linear-gradient(180deg, transparent, rgba(91, 143, 249, .30), transparent);
  transition: height .3s ease;
}

/* ---------- 段 2 · 导航项 ---------- */
.rail-items {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 2px;
  margin: 0 auto;                   /* 在导航条内水平居中 */
  padding: 3px;
  border-radius: var(--r-full);
}

/* 滑动指示胶囊 */
.rail-pill {
  position: absolute;
  top: 3px; left: 0;
  height: calc(100% - 6px);
  width: var(--pw, 0px);
  border-radius: var(--r-full);
  background: #fff;
  box-shadow: 0 3px 10px -3px rgba(31, 60, 184, .28),
              inset 0 0 0 1px rgba(91, 143, 249, .14);
  opacity: 0;
  pointer-events: none;
  transform: translateX(var(--px, 0px));
  transition: transform .42s cubic-bezier(.34, 1.3, .64, 1),
              width .42s cubic-bezier(.34, 1.3, .64, 1),
              opacity .25s ease,
              background .3s ease;
  will-change: transform, width;
}
.rail-pill.on { opacity: 1; }

.rail-items a {
  position: relative;
  z-index: 1;
  display: block;
  min-width: calc(62px - var(--sp) * 3px);   /* 六项等宽，文字居中 */
  text-align: center;
  padding: calc(7px - var(--sp) * 1px) 10px;
  border-radius: var(--r-full);
  font-size: calc(15px - var(--sp) * 1px);
  font-weight: 500;
  color: var(--c-ink-700);
  white-space: nowrap;
  transition: color .3s ease, opacity .3s ease, min-width .45s cubic-bezier(.4, 0, .2, 1);
}

/* 聚焦模式：hover 导航区时，非 hover 项变暗 */
.rail-items:hover a { opacity: .48; }
.rail-items:hover a:hover { opacity: 1; color: var(--c-blue-700); }
.rail-items a.is-active { color: var(--c-blue-700); opacity: 1; }

/* Rolodex 文字上滚 */
.rail-items .roll {
  position: relative;
  display: block;
  height: 1.35em;
  line-height: 1.35em;
  overflow: hidden;
}
.rail-items .roll > span {
  display: block;
  height: 1.35em;
  transition: transform .46s cubic-bezier(.4, 0, .2, 1);
}
.rail-items .roll > span + span {
  position: absolute;
  top: 100%; left: 0; right: 0;
  color: var(--c-blue-600);
}
.rail-items a:hover .roll > span { transform: translateY(-100%); }

/* ---------- 悬停预览卡 ---------- */
.rail-peek {
  position: absolute;
  z-index: 1;
  top: calc(100% + 12px);
  left: var(--peek-x, 50%);
  width: 300px;
  margin-left: -150px;
  padding: 14px 16px;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(22px) saturate(180%);
  -webkit-backdrop-filter: blur(22px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .82);
  box-shadow: var(--sh-card);
  opacity: 0;
  transform: translateY(-8px) scale(.97);
  pointer-events: none;
  transition: opacity .28s ease, transform .38s cubic-bezier(.2, .85, .25, 1);
}
.nav.peek-on .rail-peek { opacity: 1; transform: translateY(0) scale(1); }

.peek-title {
  font-size: .82rem;
  font-weight: 600;
  color: var(--c-ink-900);
  margin-bottom: 4px;
}
.peek-desc {
  font-size: .76rem;
  line-height: 1.55;
  color: var(--c-ink-500);
}

/* ---------- 段 3 · 操作 ---------- */
.rail-actions {
  position: relative;
  z-index: 1;
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: calc(36px - var(--sp) * 3px);
  height: calc(36px - var(--sp) * 3px);
  border-radius: 50%;
  flex: none;
  color: var(--c-ink-700);
  border: 1px solid rgba(91, 143, 249, .18);
  background: rgba(255, 255, 255, .5);
  transition: background .25s, color .25s, transform .35s cubic-bezier(.34, 1.4, .64, 1);
}
.nav-icon:hover {
  background: rgba(255, 255, 255, .95);
  color: var(--c-blue-700);
  transform: rotate(-25deg) scale(1.06);
}

.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun  { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }

/* CTA：光带扫过 + 呼吸光晕 */
.nav-cta {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: calc(36px - var(--sp) * 3px);
  padding: 0 17px;
  border-radius: var(--r-full);
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--c-blue-500) 0%, var(--c-blue-600) 100%);
  box-shadow: 0 8px 20px -8px rgba(59, 111, 240, .55),
              inset 0 1px 0 rgba(255, 255, 255, .25);
  transition: transform .3s cubic-bezier(.34, 1.4, .64, 1), box-shadow .3s ease;
  animation: ctaBreath 3.4s ease-in-out infinite;
}
@keyframes ctaBreath {
  0%, 100% { box-shadow: 0 8px 20px -8px rgba(59, 111, 240, .55), inset 0 1px 0 rgba(255, 255, 255, .25); }
  50%      { box-shadow: 0 10px 26px -8px rgba(59, 111, 240, .78), inset 0 1px 0 rgba(255, 255, 255, .3); }
}

.nav-cta > * { position: relative; }
.nav-cta::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: -60%;
  width: 40%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .48), transparent);
  transform: skewX(-18deg);
  transition: left .62s cubic-bezier(.4, 0, .2, 1);
}
.nav-cta:hover::before { left: 130%; }
.nav-cta:hover {
  transform: translateY(-2px);
  animation: none;
  box-shadow: 0 14px 26px -8px rgba(59, 111, 240, .68), inset 0 1px 0 rgba(255, 255, 255, .3);
}
.nav-cta svg { transition: transform .3s ease; }
.nav-cta:hover svg { transform: translateX(3px); }

/* 汉堡（仅小屏） */
.nav-burger {
  display: none;
  width: calc(36px - var(--sp) * 3px);
  height: calc(36px - var(--sp) * 3px);
  border-radius: 50%;
  flex: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid rgba(91, 143, 249, .18);
  background: rgba(255, 255, 255, .5);
}
.nav-burger span {
  display: block;
  width: 16px; height: 1.8px;
  border-radius: 2px;
  background: var(--c-ink-800);
  transition: transform .35s cubic-bezier(.4, 0, .2, 1), opacity .25s;
}
body.menu-open .nav-burger span:first-child { transform: translateY(3.4px) rotate(45deg); }
body.menu-open .nav-burger span:last-child  { transform: translateY(-3.4px) rotate(-45deg); }


/* ============================================
   移动端全屏菜单 · 索引式
   ============================================ */
.site-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  background: rgba(242, 246, 254, .86);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  opacity: 0;
  visibility: hidden;
  transition: opacity .4s cubic-bezier(.4, 0, .2, 1), visibility .4s;
  display: grid;
  place-items: center;
  overflow-y: auto;
}
.site-menu.open { opacity: 1; visibility: visible; }

.site-menu-inner {
  width: 100%;
  max-width: 900px;
  padding: 120px 32px 64px;
}

/* ---------- 索引列表 ---------- */
.menu-index {
  display: grid;
  gap: 2px;
  border-top: 1px solid rgba(91, 143, 249, .16);
}

.menu-index a {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 14px;
  overflow: hidden;
  border-bottom: 1px solid rgba(91, 143, 249, .12);
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--c-ink-900);
  line-height: 1.15;
  opacity: 0;
  transform: translateY(22px);
  transition: color .25s ease, opacity .5s ease,
              transform .5s cubic-bezier(.4, 0, .2, 1);
}

/* 从左扫入的高亮条 */
.menu-index a::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(91, 143, 249, .16) 0%, rgba(103, 232, 249, .06) 45%, transparent 78%);
  transform: translateX(-101%);
  transition: transform .55s cubic-bezier(.4, 0, .2, 1);
  z-index: -1;
}
.menu-index a:hover::before { transform: translateX(0); }
.menu-index a:hover { color: var(--c-blue-600); }

.menu-index em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--c-blue-500);
  flex: none;
  padding-top: .35em;
}

.menu-index span { flex: 1; }

.idx-arrow {
  font-style: normal;
  font-size: .95rem;
  color: var(--c-ink-400);
  transition: transform .3s cubic-bezier(.4, 0, .2, 1), color .25s;
}
.menu-index a:hover .idx-arrow { transform: translate(4px, -4px); color: var(--c-blue-500); }

.site-menu.open .menu-index a { opacity: 1; transform: translateY(0); }
.site-menu.open .menu-index a:nth-child(1) { transition-delay: .06s; }
.site-menu.open .menu-index a:nth-child(2) { transition-delay: .12s; }
.site-menu.open .menu-index a:nth-child(3) { transition-delay: .18s; }
.site-menu.open .menu-index a:nth-child(4) { transition-delay: .24s; }
.site-menu.open .menu-index a:nth-child(5) { transition-delay: .30s; }
.site-menu.open .menu-index a:nth-child(6) { transition-delay: .36s; }

.site-menu-secondary {
  margin-top: 48px;
  padding-top: 36px;
  border-top: 1px solid rgba(91, 143, 249, .18);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 260px));
  gap: 48px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease .42s, transform .5s ease .42s;
}
.site-menu.open .site-menu-secondary { opacity: 1; transform: translateY(0); }

.menu-sec-col h5 {
  font-size: .78rem;
  color: var(--c-ink-500);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 14px;
  font-weight: 500;
}
.menu-sec-col a {
  display: block;
  font-size: .95rem;
  color: var(--c-ink-700);
  padding: 5px 0;
  transition: color .2s;
}
.menu-sec-col a:hover { color: var(--c-blue-600); }
.menu-sec-col p { font-size: .9rem; color: var(--c-ink-500); margin-top: 10px; }


/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .rail-items a { padding-left: 8px; padding-right: 8px; min-width: calc(56px - var(--sp) * 3px); }
}

@media (max-width: 900px) {
  .rail-items { display: none; }
  .rail-actions { margin-left: auto; }   /* 中段隐藏后操作区仍需贴右 */
  .rail-sep { display: none; }
  .rail-peek { display: none; }
  .nav-burger { display: flex; }
  .nav { padding: 12px 14px 0; }
  .nav-cta span { display: none; }
  .nav-cta { padding: 0 12px; }
  .site-menu-secondary { grid-template-columns: 1fr; gap: 22px; }
}

/* 移动端全屏菜单：紧凑化，目录 + 服务能力 + 联系我们一屏展开，
   邮箱 / 电话 / 地址保持与 PC 相同的字号与颜色，仅收紧间距 */
@media (max-width: 720px) {
  .site-menu-inner { padding: 88px 22px 36px; }
  .menu-index a { padding: 10px 10px; font-size: clamp(1.3rem, 5.4vw, 1.65rem); }
  .menu-index a .idx-arrow { font-size: .85rem; }
  /* 两列并排（同 PC 布局），保证不用滚动即可看到联系方式 */
  .site-menu-secondary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 24px;
    padding-top: 20px;
    gap: 16px 20px;
  }
  .menu-sec-col h5 { margin-bottom: 8px; }
  .menu-sec-col a { padding: 4px 0; }
  .menu-sec-col a[href^="mailto:"],
  .menu-sec-col a[href^="tel:"] { white-space: nowrap; }
  .menu-sec-col p { margin-top: 6px; font-size: .82rem; line-height: 1.55; }
}

@media (max-width: 520px) {
  .brand-word { display: none; }
  .rail-brand { padding: 4px 10px 4px 4px; }
  .loader-foot { gap: 10px; }
  .loader-status { min-width: 0; font-size: .58rem; letter-spacing: .1em; }
}


/* ---------- 尊重系统「减少动态效果」 ---------- */
@media (prefers-reduced-motion: reduce) {
  .nav.is-in .nav-rail { animation: none; }
  .rail-items .roll > span,
  .rail-pill,
  .nav-cta::before,
  .brand-mark::after { transition: none; animation: none; }
  .rail-items a:hover .roll > span { transform: none; }
  .nav-cta { animation: none; }

  .mark-halo, .mark-logo, .mark-sweep, .mark-line, .loader-scan { animation: none; }
  /* 降级时 Logo 直接静态呈现，扫光条收起（若保留会整片盖住 Logo） */
  .mark-logo { opacity: 1; transform: none; }
  .mark-sweep { display: none; }
  .mark-line { width: 100%; }
  .loader-sub, .loader-foot { animation: none; opacity: 1; }
  .loader.done .loader-seam { animation: none; }
  .loader.done .shutter-t,
  .loader.done .shutter-b { animation-duration: .01s; animation-delay: 0s; }

  .case-card, .case-visual, .case-meta, .case-go { transition: none; }
  .case-card:hover { --lift: 0px; }
  .case-card:hover .case-visual { transform: none; }
  .case-card:hover .case-sheen { animation: none; }
}

/* ============ Hero ============ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
}

.hero-title {
  margin-top: 24px;
  font-size: clamp(2.8rem, 5.4vw, 4.8rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.hero-title .gradient-text {
  background: linear-gradient(120deg, var(--c-blue-600) 0%, var(--c-blue-400) 35%, var(--c-cyan-500) 70%, var(--c-blue-700) 100%);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientFlow 8s ease-in-out infinite;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50%      { background-position: 100% 50%; }
}

.hero-sub {
  margin-top: 28px;
  max-width: 540px;
  font-size: 1.15rem;
  color: var(--c-ink-500);
  line-height: 1.65;
}

/* 移动端 hero：纵向堆叠后收紧字号与节奏，保证副标题完整可读 */
@media (max-width: 720px) {
  .hero { padding-top: 104px; padding-bottom: 56px; }
  .hero-grid { gap: 40px; }
  .hero-title { font-size: clamp(2.05rem, 10.5vw, 2.8rem); }
  .hero-sub { margin-top: 20px; font-size: 1.02rem; line-height: 1.7; }
  .hero-actions { margin-top: 28px; }
  .hero-stats { margin-top: 34px; gap: 22px 28px; }
  .stat-item .stat-num { font-size: 1.8rem; }
}

.hero-actions {
  margin-top: 40px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: 56px;
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}

.stat-item .stat-num {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--c-ink-900);
  letter-spacing: -0.03em;
  font-feature-settings: "tnum";
}

.stat-item .stat-num span {
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-item .stat-label {
  font-size: 0.85rem;
  color: var(--c-ink-500);
  margin-top: 4px;
}

/* ============ Hero 视觉 ============ */
.hero-visual {
  position: relative;
  height: 580px;
}

@media (max-width: 980px) {
  .hero-visual { height: 460px; }
}

.glass-card {
  background: var(--c-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--r-xl);
  box-shadow: var(--sh-card);
}

/* 抽象 2.5D 几何舞台 */
.stage {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  perspective: 1200px;
}

.geom {
  position: absolute;
  border-radius: 24px;
  transform-style: preserve-3d;
  will-change: transform;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

.geom-1 {
  width: 280px; height: 280px;
  top: 8%; right: 18%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.9), rgba(91,143,249,0.5) 50%, rgba(31,60,184,0.85) 100%);
  box-shadow: 0 30px 80px -20px rgba(31, 60, 184, 0.6),
              inset 0 -10px 30px rgba(0,0,0,0.1),
              inset 0 10px 30px rgba(255,255,255,0.5);
  animation: floatA 9s infinite alternate;
  position: relative;
  overflow: hidden;
}

.geom-1::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 70% 70%, rgba(255,255,255,0.5), transparent 50%);
  mix-blend-mode: overlay;
}

.geom-2 {
  width: 160px; height: 160px;
  top: 60%; right: 6%;
  background: linear-gradient(135deg, #67E8F9 0%, #5B8FF9 100%);
  border-radius: 36px;
  transform: rotate(15deg);
  box-shadow: 0 30px 60px -15px rgba(34, 211, 238, 0.55),
              inset 0 -8px 24px rgba(0,0,0,0.12),
              inset 0 8px 24px rgba(255,255,255,0.3);
  animation: floatB 7s infinite alternate;
}

.geom-3 {
  width: 120px; height: 120px;
  top: 12%; left: 10%;
  background: linear-gradient(135deg, #DCE8FE 0%, #85AEFC 100%);
  border-radius: 50%;
  box-shadow: 0 20px 50px -12px rgba(133, 174, 252, 0.6),
              inset -8px -8px 24px rgba(31,60,184,0.2),
              inset 8px 8px 24px rgba(255,255,255,0.5);
  animation: floatC 6s infinite alternate;
}

.geom-4 {
  width: 90px; height: 90px;
  top: 70%; left: 0%;
  background: linear-gradient(135deg, #1F3CB8 0%, #06B6D4 100%);
  border-radius: 18px;
  transform: rotate(-12deg);
  box-shadow: 0 18px 40px -10px rgba(6, 182, 212, 0.5);
  animation: floatD 8s infinite alternate;
}

.geom-5 {
  width: 70px; height: 70px;
  top: 38%; left: 18%;
  background: linear-gradient(135deg, #FFFFFF 0%, #B5CFFE 100%);
  border-radius: 50%;
  box-shadow: 0 12px 30px -6px rgba(91, 143, 249, 0.4);
  animation: floatE 5s infinite alternate;
}

@keyframes floatA {
  0%   { transform: translateY(0) rotate(-6deg); }
  100% { transform: translateY(-20px) rotate(8deg); }
}
@keyframes floatB {
  0%   { transform: translateY(0) rotate(15deg); }
  100% { transform: translateY(-30px) rotate(25deg); }
}
@keyframes floatC {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-22px); }
}
@keyframes floatD {
  0%   { transform: translateY(0) rotate(-12deg); }
  100% { transform: translateY(-18px) rotate(0deg); }
}
@keyframes floatE {
  0%   { transform: translateY(0) scale(1); }
  100% { transform: translateY(-14px) scale(1.08); }
}

/* 抽象数据流线条 */
.data-flow {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.data-flow svg {
  width: 100%;
  height: 100%;
}

.data-flow path {
  fill: none;
  stroke: url(#flow-gradient);
  stroke-width: 1.5;
  stroke-dasharray: 6 4;
  opacity: 0.5;
  animation: dashFlow 8s linear infinite;
}

@keyframes dashFlow {
  to { stroke-dashoffset: -200; }
}

/* Hero 浮动玻璃卡片 */
.float-card {
  position: absolute;
  padding: 16px 20px;
  border-radius: var(--r-md);
  background: var(--c-glass-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-card);
  font-size: 0.85rem;
  z-index: 5;
}

.float-card-1 {
  top: 4%; left: 38%;
  animation: floatCard1 6s ease-in-out infinite alternate;
}

.float-card-2 {
  bottom: 8%; left: 50%;
  animation: floatCard2 7s ease-in-out infinite alternate;
}

@keyframes floatCard1 {
  0%   { transform: translateY(0); }
  100% { transform: translateY(-12px); }
}
@keyframes floatCard2 {
  0%   { transform: translateY(0); }
  100% { transform: translateY(10px); }
}

.float-card .row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-ink-700);
}

.float-card .icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-blue-100), var(--c-blue-300));
  color: var(--c-blue-700);
}

.float-card .badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  background: rgba(34, 211, 238, 0.15);
  color: var(--c-cyan-500);
  margin-left: 4px;
}

.float-card .badge.up {
  background: rgba(34, 197, 94, 0.15);
  color: #16A34A;
}

/* ============ Marquee 客户 Logo ============ */
.marquee {
  position: relative;
  overflow: hidden;
  margin-top: 80px;
  padding: 36px 0;
  border-top: 1px solid rgba(91, 143, 249, 0.1);
  border-bottom: 1px solid rgba(91, 143, 249, 0.1);
}

.marquee::before, .marquee::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}
.marquee::before { left: 0;  background: linear-gradient(90deg, var(--c-bg), transparent); }
.marquee::after  { right: 0; background: linear-gradient(-90deg, var(--c-bg), transparent); }

.marquee-track {
  display: flex;
  gap: 64px;
  width: max-content;
  animation: marquee 36s linear infinite;
}

.marquee:hover .marquee-track { animation-play-state: paused; }

@keyframes marquee {
  to { transform: translateX(-50%); }
}

.logo-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--c-ink-500);
  font-size: 1.1rem;
  opacity: 0.85;
  transition: opacity 0.2s ease;
}

.logo-item:hover { opacity: 1; }

.logo-item .logo-mark {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: var(--c-glass);
  border: 1px solid rgba(91, 143, 249, 0.15);
  display: grid; place-items: center;
  font-size: 0.95rem;
}

/* 行业业态双行名称 */
.logo-item .logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  gap: 1px;
}
.logo-item .logo-text b {
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-ink-700);
  letter-spacing: .02em;
  white-space: nowrap;
}
.logo-item .logo-text i {
  font-style: normal;
  font-size: .6rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-ink-500);
  opacity: .72;
  white-space: nowrap;
}

/* ============ 服务区块 ============ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 56px;
}

@media (max-width: 880px) {
  .services-grid { grid-template-columns: 1fr; }
}

.service-card {
  padding: 36px;
  border-radius: var(--r-xl);
  background: var(--c-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  position: relative;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(.4,0,.2,1);
  cursor: pointer;
  min-height: 380px;
  display: flex;
  flex-direction: column;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(91, 143, 249, 0) 0%, rgba(91, 143, 249, 0.06) 100%);
  opacity: 0;
  transition: opacity 0.4s;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--sh-hover);
  border-color: rgba(91, 143, 249, 0.3);
}

.service-card:hover::before { opacity: 1; }

.service-num {
  position: absolute;
  top: 28px; right: 32px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--c-blue-400);
  letter-spacing: 0.05em;
}

.service-icon {
  width: 64px; height: 64px;
  border-radius: var(--r-md);
  background: linear-gradient(135deg, var(--c-blue-100) 0%, var(--c-blue-300) 100%);
  display: grid; place-items: center;
  color: white;
  margin-bottom: 24px;
  position: relative;
  box-shadow: 0 8px 24px -8px rgba(91, 143, 249, 0.5);
}

.service-icon::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.4), transparent 50%);
}

.service-icon svg {
  width: 28px; height: 28px;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.service-card p {
  font-size: 0.96rem;
  line-height: 1.65;
  color: var(--c-ink-500);
  margin-bottom: 24px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.service-tag {
  padding: 5px 12px;
  border-radius: var(--r-full);
  background: rgba(91, 143, 249, 0.08);
  color: var(--c-blue-700);
  font-size: 0.78rem;
  font-weight: 500;
  border: 1px solid rgba(91, 143, 249, 0.15);
}

.service-link {
  margin-top: 24px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--c-blue-600);
  font-weight: 500;
  position: relative;
  z-index: 1;
}

.service-link .arrow {
  transition: transform 0.25s ease;
}

.service-card:hover .arrow {
  transform: translateX(4px);
}

/* ============ 案例区块 ============ */
/* ---------- 杂志式案例编排 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 22px;
  margin-top: 56px;
}

/* 外层只负责入场位移，卡片本身负责 hover / 3D 倾斜，两者互不覆盖 */
.case-wrap { position: relative; }
.case-wrap.feature { grid-column: span 8; }
.case-wrap.half    { grid-column: span 4; }
.case-wrap.third   { grid-column: span 4; }
.case-wrap.wide    { grid-column: span 12; }

.case-card {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--c-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-card);
  cursor: pointer;
  transform: perspective(1200px)
             translate3d(0, var(--lift, 0px), 0)
             rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform .45s cubic-bezier(.2, .85, .25, 1),
              box-shadow .4s ease,
              border-color .4s ease,
              opacity .35s ease;
  will-change: transform;
}

.case-card:hover {
  --lift: -10px;
  border-color: rgba(91, 143, 249, .34);
  box-shadow: 0 32px 64px -24px rgba(31, 60, 184, .38),
              0 12px 28px -14px rgba(31, 60, 184, .22);
}

/* 悬停时其余卡片退后，形成聚焦 */
.cases-grid:hover .case-card:not(:hover) { opacity: .55; }

/* 光标跟随光斑 */
.case-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: radial-gradient(460px circle at var(--mx, 50%) var(--my, 50%),
    rgba(255, 255, 255, .26) 0%,
    rgba(103, 232, 249, .10) 42%,
    transparent 70%);
  opacity: 0;
  transition: opacity .35s ease;
}
.case-card:hover::before { opacity: 1; }

/* ---------- 视觉层 ---------- */
.case-visual {
  position: relative;
  aspect-ratio: var(--visual-ratio);
  height: auto;
  overflow: hidden;
  transition: transform .8s cubic-bezier(.2, .85, .25, 1);
  flex: none;
}
.case-card:hover .case-visual { transform: scale(1.06); }

.case-visual-bg { position: absolute; inset: 0; }

/* 掠过画面的光带 */
.case-sheen {
  position: absolute;
  top: -25%; bottom: -25%;
  left: 0;
  width: 200px;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .34), transparent);
  transform: translateX(-180%) skewX(-14deg);
}
.case-card:hover .case-sheen { animation: caseSheen 1.15s cubic-bezier(.2, .7, .3, 1); }
@keyframes caseSheen {
  0%   { opacity: 0; transform: translateX(-180%) skewX(-14deg); }
  18%  { opacity: 1; }
  100% { opacity: 0; transform: translateX(620%) skewX(-14deg); }
}

/* ---------- 信息层 ---------- */
.case-meta {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 22px 26px 26px;
  transition: transform .5s cubic-bezier(.2, .85, .25, 1);
}
.case-card:hover .case-meta { transform: translateY(-3px); }
.case-wrap.feature .case-meta { padding: 26px 30px 30px; }

/* 编号水印 */
.case-index {
  position: absolute;
  top: 16px; right: 24px;
  font-size: 2.6rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--c-ink-900);
  opacity: .07;
  pointer-events: none;
  transition: opacity .4s ease,
              transform .5s cubic-bezier(.2, .85, .25, 1),
              color .4s ease;
}
.case-card:hover .case-index {
  opacity: .15;
  color: var(--c-blue-600);
  transform: translateY(-4px);
}
.case-wrap.feature .case-index { font-size: 3.6rem; top: 18px; right: 28px; }

/* 悬停滑入的圆形箭头 */
.case-go {
  position: absolute;
  right: 26px; bottom: 24px;
  width: 42px; height: 42px;
  border-radius: 50%;
  display: grid; place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 12px 26px -10px rgba(59, 111, 240, .8);
  opacity: 0;
  transform: translate(10px, 10px) scale(.86);
  transition: opacity .4s ease,
              transform .5s cubic-bezier(.2, .85, .25, 1);
}
.case-card:hover .case-go { opacity: 1; transform: none; }
.case-go svg { transition: transform .35s ease; }
.case-card:hover .case-go svg { transform: translateX(2px); }

.case-cat {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--c-blue-600);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.case-cat::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  flex: none;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  transition: transform .4s cubic-bezier(.34, 1.4, .64, 1);
}
.case-card:hover .case-cat::before { transform: scale(1.7); }

.case-card h3 {
  margin-top: 10px;
  font-size: 1.2rem;
  line-height: 1.35;
  font-weight: 600;
  color: var(--c-ink-900);
  transition: color .3s ease;
}
.case-wrap.feature h3 { font-size: 1.75rem; }
.case-card:hover h3 { color: var(--c-blue-700); }

.case-info {
  margin-top: 14px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--c-ink-500);
}

.case-info .dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--c-ink-300);
}

/* ---------- 通栏卡：图左文右 ---------- */
.case-wrap.wide .case-card { flex-direction: row; min-height: 320px; }
.case-wrap.wide .case-visual {
  width: 46%;
  flex: none;
}
.case-wrap.wide .case-meta {
  flex: 1;
  justify-content: center;
  padding: 40px 44px;
}
.case-wrap.wide h3 { font-size: 1.7rem; }
.case-wrap.wide .case-index { font-size: 3.2rem; top: 22px; right: 34px; }

@media (max-width: 980px) {
  .cases-grid { gap: 20px; }
  .case-wrap.feature,
  .case-wrap.half,
  .case-wrap.third,
  .case-wrap.wide { grid-column: span 12; }

  .case-wrap.wide .case-card { flex-direction: column; min-height: 0; }
  .case-wrap.wide .case-visual { width: 100%; }
  .case-wrap.wide .case-meta { padding: 26px 30px 30px; }
}
/* 案例视觉：抽象几何展示 */
.case-visual-design-1 {
  background:
    radial-gradient(circle at 30% 40%, rgba(91, 143, 249, 0.5), transparent 50%),
    linear-gradient(135deg, #DCE8FE 0%, #5B8FF9 100%);
}

.case-visual-design-1::before, .case-visual-design-1::after {
  content: "";
  position: absolute;
  border-radius: 16px;
}
.case-visual-design-1::before {
  width: 120px; height: 160px;
  top: 30px; left: 30px;
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(8px);
  transform: rotate(-8deg);
  box-shadow: 0 20px 40px -10px rgba(31,60,184,0.3);
}
.case-visual-design-1::after {
  width: 100px; height: 100px;
  top: 80px; left: 100px;
  background: rgba(255,255,255,0.85);
  border-radius: 50%;
  box-shadow: 0 20px 40px -10px rgba(31,60,184,0.4);
}

.case-visual-app-1 {
  background: linear-gradient(135deg, #142C8A 0%, #3B6FF0 100%);
}

.case-visual-app-1::before {
  content: "";
  position: absolute;
  width: 200px; height: 380px;
  background: rgba(255,255,255,0.95);
  border-radius: 28px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  box-shadow: 0 30px 60px -10px rgba(0,0,0,0.4);
}

.case-visual-app-1::after {
  content: "";
  position: absolute;
  width: 80px; height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, #67E8F9, #06B6D4);
  bottom: 40px; right: 40px;
  box-shadow: 0 12px 30px -6px rgba(6, 182, 212, 0.6);
}

.case-visual-platform-1 {
  background:
    radial-gradient(circle at 80% 80%, rgba(103, 232, 249, 0.4), transparent 50%),
    linear-gradient(135deg, #0A1A5C 0%, #1F3CB8 100%);
}

.case-visual-platform-1::before {
  content: "";
  position: absolute;
  inset: 30px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 12px;
  background:
    linear-gradient(rgba(255,255,255,0.05) 1px, transparent 1px) 0 0 / 24px 24px,
    linear-gradient(90deg, rgba(255,255,255,0.05) 1px, transparent 1px) 0 0 / 24px 24px;
}

.case-visual-platform-1::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 120px; height: 120px;
  background: linear-gradient(135deg, #67E8F9, #3B6FF0);
  border-radius: 16px;
  transform: translate(-50%, -50%) rotate(15deg);
  box-shadow: 0 20px 40px -10px rgba(103, 232, 249, 0.5);
}

.case-visual-system-1 {
  background: linear-gradient(135deg, #FFFFFF 0%, #DCE8FE 100%);
}

.case-visual-system-1::before {
  content: "";
  position: absolute;
  width: 70%;
  height: 60%;
  top: 20%; left: 15%;
  background: linear-gradient(180deg, #F6F8FC 0%, #DCE8FE 100%);
  border-radius: 12px;
  box-shadow: 0 20px 40px -10px rgba(31, 60, 184, 0.15);
}

.case-visual-system-1::after {
  content: "";
  position: absolute;
  width: 60%;
  height: 12px;
  background: var(--c-blue-500);
  border-radius: 6px;
  bottom: 30%; left: 20%;
  box-shadow: 0 6px 16px -2px rgba(91, 143, 249, 0.6);
}

.case-visual-mini-1 {
  background: linear-gradient(135deg, #1F3CB8 0%, #67E8F9 100%);
}

.case-visual-mini-1::before {
  content: "";
  position: absolute;
  width: 130px; height: 130px;
  border-radius: 30px;
  top: 50%; left: 50%;
  background: rgba(255,255,255,0.95);
  transform: translate(-50%, -50%) rotate(12deg);
  box-shadow: 0 20px 40px -10px rgba(0,0,0,0.3);
}

/* ============ 客户矩阵 ============ */
.clients-section {
  background: linear-gradient(180deg, transparent, rgba(220, 232, 254, 0.4), transparent);
}

/* ---------- 三行交错品牌墙（参考 comma.link：恒速 + 入视野驱动） ---------- */
.logo-wall {
  --wall-cell: max(170px, calc((100vw - 120px) / 7));
  position: relative;
  margin-top: 56px;
  margin-inline: calc(50% - 50vw);          /* 通栏破出容器，贴近整屏 */
  overflow: hidden;
}

.logo-row {
  overflow: hidden;
  padding-block: 22px;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent);
}

.logo-track {
  display: flex;
  width: max-content;
  animation: wall-drift-left var(--dur, 40s) linear infinite;
  animation-play-state: paused;             /* 默认静止，入视野后才跑 */
}

.logo-row[data-direction="right"] .logo-track { animation-name: wall-drift-right; }
.logo-wall.is-moving .logo-track { animation-play-state: running; }

@keyframes wall-drift-left  { from { transform: translateX(0); }    to { transform: translateX(-50%); } }
@keyframes wall-drift-right { from { transform: translateX(-50%); } to { transform: translateX(0); } }

.logo-set { display: flex; align-items: center; flex: none; }

.logo-cell {
  width: var(--wall-cell);
  height: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: default;
  transition: transform .35s cubic-bezier(.22, .8, .32, 1);
}

.logo-cell .zh {
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--c-ink-700);
  white-space: nowrap;
  transition: color .35s ease;
}

.logo-cell .en {
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--c-ink-500);
  white-space: nowrap;
  transition: color .35s ease;
}

@media (hover: hover) {
  .logo-cell:hover { transform: translateY(-3px) scale(1.05); }
  .logo-cell:hover .zh { color: var(--c-blue-600); }
  .logo-cell:hover .en { color: var(--c-blue-500); }
}

/* 深色主题 */
:root[data-theme="dark"] .logo-cell .zh { color: var(--c-ink-300); }
:root[data-theme="dark"] .logo-cell .en { color: var(--c-ink-500); }
:root[data-theme="dark"] .logo-cell:hover .zh { color: #9CC0FF; }
:root[data-theme="dark"] .logo-cell:hover .en { color: #6FA1F5; }

/* 窄屏：同样保持自动轮播，仅缩小格子与节奏（遮罩渐隐保留） */
@media (max-width: 880px) {
  .logo-wall { --wall-cell: max(118px, calc(100vw / 3.2)); margin-top: 36px; }
  .logo-row { padding-block: 12px; }
  .logo-cell { height: 56px; gap: 3px; }
  .logo-cell .zh { font-size: 1.02rem; }
  .logo-cell .en { font-size: .56rem; letter-spacing: .2em; }
}

/* 减动效偏好：退化为静态三列网格 */
@media (prefers-reduced-motion: reduce) {
  .logo-wall .logo-row .logo-track { animation: none !important; transform: none; width: 100%; }
  .logo-set { width: 100%; flex-wrap: wrap; justify-content: center; }
  .logo-set[aria-hidden="true"] { display: none; }
  .logo-cell { width: 33.33%; height: 58px; transition: none; }
}

/* ============ 资讯区块 ============ */
.news-list {
  margin-top: 56px;
  display: grid;
  gap: 16px;
}

.news-item {
  display: grid;
  grid-template-columns: 140px 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 28px 32px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  transition: all 0.3s ease;
  cursor: pointer;
}

@media (max-width: 720px) {
  .news-item { grid-template-columns: 1fr; gap: 12px; }
}

.news-item:hover {
  transform: translateX(6px);
  border-color: rgba(91, 143, 249, 0.3);
}

.news-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--c-ink-500);
  letter-spacing: 0.05em;
}

.news-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  background: rgba(91, 143, 249, 0.12);
  color: var(--c-blue-700);
  font-size: 0.72rem;
  font-weight: 500;
  margin-right: 8px;
}

.news-title {
  font-size: 1.1rem;
  color: var(--c-ink-800);
  font-weight: 500;
  line-height: 1.45;
}

.news-arrow {
  color: var(--c-ink-400);
  transition: all 0.3s ease;
}

.news-item:hover .news-arrow {
  color: var(--c-blue-500);
  transform: translateX(4px);
}

/* ============ 关于我们 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-top: 32px;
}

@media (max-width: 980px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
}

.about-visual {
  position: relative;
  height: 480px;
  border-radius: var(--r-2xl);
  overflow: hidden;
  background:
    radial-gradient(circle at 30% 20%, rgba(91, 143, 249, 0.35), transparent 50%),
    linear-gradient(135deg, #0A1A5C 0%, #1F3CB8 60%, #3B6FF0 100%);
  box-shadow: var(--sh-card);
  display: grid;
  place-items: center;
}

.about-visual-inner {
  position: relative;
  width: 80%;
  height: 80%;
  display: grid;
  place-items: center;
}

.about-orbit {
  position: absolute;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 50%;
}

.about-orbit-1 { width: 320px; height: 320px; animation: rotate1 30s linear infinite; }
.about-orbit-2 { width: 480px; height: 480px; animation: rotate2 50s linear infinite; }
.about-orbit-3 { width: 640px; height: 640px; animation: rotate3 70s linear infinite; opacity: 0.5; }

@keyframes rotate1 { to { transform: rotate(360deg); } }
@keyframes rotate2 { to { transform: rotate(-360deg); } }
@keyframes rotate3 { to { transform: rotate(360deg); } }

.orbit-node {
  position: absolute;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 8px 24px -4px rgba(0,0,0,0.3);
  display: grid; place-items: center;
  color: var(--c-blue-700);
  font-weight: 700;
}

.orbit-node.center {
  width: 96px; height: 96px;
  background: linear-gradient(135deg, #67E8F9, #5B8FF9);
  color: white;
  font-size: 1.6rem;
  box-shadow: 0 16px 40px -8px rgba(91, 143, 249, 0.7);
}

.about-orbit-1 .orbit-node { top: -28px; left: calc(50% - 28px); }
.about-orbit-2 .orbit-node { bottom: -28px; right: 30px; }
.about-orbit-3 .orbit-node { top: calc(50% - 28px); left: -28px; }

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 32px;
}

.about-stat {
  padding: 22px 24px;
  border-radius: var(--r-md);
  background: var(--c-glass);
  border: 1px solid rgba(91, 143, 249, 0.15);
}

.about-stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--c-blue-600);
  letter-spacing: -0.03em;
}

.about-stat-label {
  margin-top: 4px;
  font-size: 0.85rem;
  color: var(--c-ink-500);
}

.about-text p {
  margin-top: 16px;
  line-height: 1.75;
}

.about-text .features {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.about-text .feature {
  display: flex;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--r-md);
  background: var(--c-glass);
  border: 1px solid rgba(91, 143, 249, 0.12);
}

.feature-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-blue-400), var(--c-cyan-500));
  display: grid; place-items: center;
  color: white;
  flex-shrink: 0;
}

.feature-text {
  flex: 1;
}

.feature-title {
  font-weight: 600;
  color: var(--c-ink-800);
  font-size: 0.98rem;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--c-ink-500);
  margin-top: 2px;
}

/* ============ 联系 ============ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  margin-top: 56px;
}

@media (max-width: 980px) {
  .contact-grid { grid-template-columns: 1fr; }
}

.contact-form-card {
  padding: 40px;
  border-radius: var(--r-2xl);
  background: var(--c-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-card);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

@media (max-width: 720px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--c-ink-700);
  margin-bottom: 8px;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--r-md);
  border: 1px solid rgba(91, 143, 249, 0.2);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(8px);
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--c-ink-800);
  transition: all 0.25s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--c-blue-400);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 4px rgba(91, 143, 249, 0.15);
}

.form-field textarea {
  resize: vertical;
  min-height: 110px;
  font-family: inherit;
}

.form-submit {
  margin-top: 8px;
  width: 100%;
  padding: 16px;
  justify-content: center;
}

.contact-info {
  padding: 40px;
  border-radius: var(--r-2xl);
  background: linear-gradient(135deg, var(--c-blue-700) 0%, var(--c-blue-900) 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.contact-info::before {
  content: "";
  position: absolute;
  top: -50%; right: -30%;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(103, 232, 249, 0.4), transparent 70%);
  filter: blur(40px);
}

.contact-info::after {
  content: "";
  position: absolute;
  bottom: -40%; left: -20%;
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(91, 143, 249, 0.5), transparent 70%);
  filter: blur(40px);
}

.contact-info > * { position: relative; z-index: 1; }

.contact-info h3 {
  color: white;
  font-size: 1.6rem;
  margin-bottom: 12px;
}

.contact-info p {
  color: rgba(255,255,255,0.75);
  font-size: 0.95rem;
  line-height: 1.65;
}

.contact-list {
  margin-top: 32px;
  display: grid;
  gap: 18px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(8px);
}

.contact-item-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(103, 232, 249, 0.18);
  display: grid; place-items: center;
  color: var(--c-cyan-300);
}

.contact-item-text {
  flex: 1;
}

.contact-item-label {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.6);
}

.contact-item-value {
  font-size: 0.96rem;
  color: white;
  font-weight: 500;
  margin-top: 2px;
}

/* ============ Footer ============ */
.footer {
  margin-top: 80px;
  padding: 64px 0 32px;
  border-top: 1px solid rgba(91, 143, 249, 0.15);
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.4));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

.footer-brand p {
  margin-top: 16px;
  font-size: 0.92rem;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 0.85rem;
  color: var(--c-ink-700);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 10px;
}

.footer-col a {
  font-size: 0.9rem;
  color: var(--c-ink-500);
  transition: color 0.2s ease;
}

.footer-col a:hover { color: var(--c-blue-600); }

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(91, 143, 249, 0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--c-ink-500);
}

.footer-bottom .links {
  display: flex;
  gap: 24px;
}

/* ============ 滚动动画 ============ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }
.reveal[data-delay="4"] { transition-delay: 0.4s; }

/* ============ 实用工具 ============ */
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.mt-4 { margin-top: 16px; }
.mt-8 { margin-top: 32px; }
.mt-12 { margin-top: 48px; }
.mt-16 { margin-top: 64px; }

.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

/* 数字滚动数字字体 */
.num {
  font-feature-settings: "tnum" 1;
  font-variant-numeric: tabular-nums;
}


/* ============ 深色模式（导航太阳/月亮按钮切换） ============ */
:root[data-theme="dark"] {
  --c-bg:      #070C1B;
  --c-bg-card: #0E152B;
  --c-glass:   rgba(255, 255, 255, 0.055);
  --c-glass-strong: rgba(255, 255, 255, 0.09);

  --c-ink-900: #F2F5FC;
  --c-ink-800: #DDE3F0;
  --c-ink-700: #C3CCE0;
  --c-ink-600: #9AA6C2;
  --c-ink-500: #7E8AA8;
  --c-ink-400: #5F6C8C;
  --c-ink-200: #2A3350;
  --c-ink-100: #161E38;
  --c-ink-50:  #101830;
}

:root[data-theme="dark"] body {
  background: var(--c-bg);
}

/* 背景层换色 */
:root[data-theme="dark"] .bg-layer .gradient-mesh {
  background:
    radial-gradient(ellipse 60% 50% at 18% 12%, rgba(59, 111, 240, 0.30), transparent 60%),
    radial-gradient(ellipse 50% 50% at 82% 28%, rgba(6, 182, 212, 0.22), transparent 60%),
    radial-gradient(ellipse 50% 60% at 50% 88%, rgba(31, 60, 184, 0.26), transparent 65%),
    radial-gradient(ellipse 40% 40% at 90% 80%, rgba(103, 232, 249, 0.12), transparent 60%);
}

:root[data-theme="dark"] .bg-layer .grid-overlay {
  background-image:
    linear-gradient(rgba(120, 160, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 160, 255, 0.07) 1px, transparent 1px);
}

:root[data-theme="dark"] .bg-layer .noise-overlay { opacity: 0.07; mix-blend-mode: overlay; }

/* 玻璃卡片描边与阴影 */
/* 案例卡：深色下的光斑与编号 */
:root[data-theme="dark"] .case-card::before {
  background: radial-gradient(460px circle at var(--mx, 50%) var(--my, 50%),
    rgba(91, 143, 249, .26) 0%,
    rgba(103, 232, 249, .10) 45%,
    transparent 72%);
}
:root[data-theme="dark"] .case-index { color: #9CC0FF; }
:root[data-theme="dark"] .case-card:hover h3 { color: #C7DBFF; }

:root[data-theme="dark"] .glass-card,
:root[data-theme="dark"] .service-card,
:root[data-theme="dark"] .case-card,
:root[data-theme="dark"] .news-item,
:root[data-theme="dark"] .contact-form-card,
:root[data-theme="dark"] .about-stat,
:root[data-theme="dark"] .about-text .feature,
:root[data-theme="dark"] .float-card {
  border-color: rgba(255, 255, 255, 0.10);
  box-shadow: 0 12px 40px -12px rgba(0, 0, 0, 0.55);
}

/* ---- 导轨（深色） ---- */
:root[data-theme="dark"] .nav-rail {
  background: rgba(16, 24, 48, calc(.52 + var(--sp) * .30));
  border-color: rgba(255, 255, 255, calc(.09 + var(--sp) * .07));
  box-shadow: 0 10px 34px -14px rgba(0, 0, 0, calc(.5 + var(--sp) * .25)),
              inset 0 1px 0 rgba(255, 255, 255, .07);
}

:root[data-theme="dark"] .rail-hair {
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .22), transparent);
}

:root[data-theme="dark"] .rail-glow {
  background: radial-gradient(circle,
    rgba(91, 143, 249, .38) 0%,
    rgba(103, 232, 249, .14) 40%,
    transparent 70%);
}

:root[data-theme="dark"] .rail-sep {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, .18), transparent);
}

/* 指示胶囊（深色） */
:root[data-theme="dark"] .rail-pill {
  background: rgba(255, 255, 255, .10);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .16);
}

:root[data-theme="dark"] .rail-items a { color: var(--c-ink-600); }
:root[data-theme="dark"] .rail-items a:hover,
:root[data-theme="dark"] .rail-items a.is-active { color: #9CC0FF; }
:root[data-theme="dark"] .rail-items .roll > span + span { color: #9CC0FF; }

/* 悬停预览卡（深色） */
:root[data-theme="dark"] .rail-peek {
  background: rgba(16, 24, 48, .82);
  border-color: rgba(255, 255, 255, .10);
  box-shadow: 0 18px 48px -16px rgba(0, 0, 0, .7);
}
:root[data-theme="dark"] .peek-desc { color: var(--c-ink-500); }

:root[data-theme="dark"] .nav-icon,
:root[data-theme="dark"] .nav-burger {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--c-ink-800);
}

:root[data-theme="dark"] .nav-icon:hover {
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
}

:root[data-theme="dark"] .nav-burger span { background: var(--c-ink-800); }

/* 全屏菜单（深色） */
:root[data-theme="dark"] .site-menu {
  background: rgba(7, 12, 27, 0.85);
}

:root[data-theme="dark"] .menu-index {
  border-top-color: rgba(255, 255, 255, .10);
}
:root[data-theme="dark"] .menu-index a {
  border-bottom-color: rgba(255, 255, 255, .07);
}
:root[data-theme="dark"] .menu-index a::before {
  background: linear-gradient(90deg, rgba(91, 143, 249, .22) 0%, rgba(103, 232, 249, .08) 45%, transparent 78%);
}
:root[data-theme="dark"] .menu-index a:hover { color: #9CC0FF; }

/* ---- 加载页（深色） ---- */
:root[data-theme="dark"] .shutter-t { background: linear-gradient(180deg, #0D1428 0%, #070C1B 100%); }
:root[data-theme="dark"] .shutter-b { background: linear-gradient(0deg,   #0D1428 0%, #070C1B 100%); }
:root[data-theme="dark"] .shutter::after {
  background-image:
    linear-gradient(rgba(120, 165, 255, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 165, 255, .12) 1px, transparent 1px);
}
:root[data-theme="dark"] .mark-halo {
  background: radial-gradient(ellipse at center,
    rgba(91, 143, 249, .42) 0%, rgba(103, 232, 249, .16) 52%, transparent 72%);
  opacity: .55;
}
:root[data-theme="dark"] .mark-sweep {
  /* 暗色下降低高光强度，避免扫过 Logo 时过曝 */
  background: linear-gradient(105deg,
    transparent 34%,
    rgba(255, 255, 255, .55) 47%,
    rgba(103, 232, 249, .38) 53%,
    transparent 66%);
}
:root[data-theme="dark"] .loader-track { background: rgba(255, 255, 255, .10); }
:root[data-theme="dark"] .loader-status,
:root[data-theme="dark"] .loader-pct { color: var(--c-ink-500); }
:root[data-theme="dark"] .loader-sub { color: var(--c-ink-400); }

/* 表单控件 */
:root[data-theme="dark"] .form-field input,
:root[data-theme="dark"] .form-field select,
:root[data-theme="dark"] .form-field textarea {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--c-ink-800);
}

:root[data-theme="dark"] .form-field input::placeholder,
:root[data-theme="dark"] .form-field textarea::placeholder {
  color: var(--c-ink-500);
}

:root[data-theme="dark"] .form-field input:focus,
:root[data-theme="dark"] .form-field select:focus,
:root[data-theme="dark"] .form-field textarea:focus {
  background: rgba(255, 255, 255, 0.09);
}

/* 跑马灯遮罩跟随背景 */
:root[data-theme="dark"] .marquee::before { background: linear-gradient(90deg, var(--c-bg), transparent); }
:root[data-theme="dark"] .marquee::after  { background: linear-gradient(-90deg, var(--c-bg), transparent); }

:root[data-theme="dark"] .footer {
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.03));
}

/* 主题切换平滑过渡（避免首次加载闪烁） */
body, .bg-layer .gradient-mesh, .nav-rail, .service-card, .case-card,
.news-item, .contact-form-card, .site-menu {
  transition: background-color .4s ease, border-color .4s ease, color .4s ease;
}

/* ============================================================
   子页面组件（服务 / 案例 / 客户 / 资讯 / 我们 / 联系）
   ============================================================ */

/* ---------- 页面 Hero ---------- */
.page-section { padding-top: 168px; }

.page-hero { max-width: 860px; margin-bottom: 56px; }

.crumbs {
  display: flex; align-items: center; gap: 8px;
  font-size: .8rem; color: var(--c-ink-500); margin-bottom: 18px;
}
.crumbs a { color: var(--c-ink-500); transition: color .25s ease; }
.crumbs a:hover { color: var(--c-blue-500); }
.crumbs .sep { color: var(--c-ink-300); }
.crumbs .cur { color: var(--c-blue-500); font-weight: 600; }

.page-title {
  margin-top: 14px;
  font-size: clamp(2.4rem, 4.6vw, 4rem);
  line-height: 1.12;
}
.page-title em {
  font-style: normal;
  background: linear-gradient(135deg, var(--c-blue-500) 0%, var(--c-cyan-500) 60%, var(--c-blue-700) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.page-sub {
  margin-top: 20px; max-width: 640px;
  font-size: 1.08rem; color: var(--c-ink-500);
}

/* ---------- 服务明细行 ---------- */
.svc-list { display: grid; gap: 20px; }

.svc-row {
  display: grid;
  grid-template-columns: 120px 1fr 200px;
  gap: 32px;
  padding: 34px 36px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  transition: transform .4s cubic-bezier(.22,.8,.32,1), box-shadow .4s ease, border-color .4s ease;
}
.svc-row:hover {
  transform: translateY(-4px);
  border-color: rgba(91, 143, 249, .32);
  box-shadow: var(--sh-card);
}

.svc-row-num {
  font-size: 2.6rem; font-weight: 700; line-height: 1;
  color: var(--c-blue-200);
  letter-spacing: -.03em;
}
.svc-row-num span {
  display: block; margin-top: 8px;
  font-size: .72rem; font-weight: 600; letter-spacing: .2em;
  text-transform: uppercase; color: var(--c-ink-400);
}

.svc-row-main h3 { font-size: 1.35rem; margin-bottom: 12px; }
.svc-row-main > p { color: var(--c-ink-600); font-size: 1rem; }
.svc-row-main .service-tags { margin-top: 16px; }

.svc-deliver {
  list-style: none; margin-top: 18px;
  display: grid; gap: 8px;
  border-top: 1px dashed rgba(91, 143, 249, .22);
  padding-top: 16px;
}
.svc-deliver li {
  position: relative; padding-left: 18px;
  font-size: .92rem; color: var(--c-ink-500);
}
.svc-deliver li::before {
  content: ''; position: absolute; left: 0; top: .58em;
  width: 6px; height: 6px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-400), var(--c-cyan-500));
}

.svc-row-side {
  display: grid; align-content: start; gap: 18px;
  padding-left: 28px;
  border-left: 1px solid rgba(91, 143, 249, .18);
}
.svc-label {
  display: block; font-size: .7rem; font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--c-ink-400); margin-bottom: 6px;
}
.svc-row-side strong { font-size: 1rem; color: var(--c-ink-700); }

/* ---------- 交付流程 ---------- */
.flow {
  margin-top: 40px;
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px;
}
.flow-step {
  position: relative;
  padding: 28px 22px 26px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  transition: transform .35s ease, box-shadow .35s ease;
}
.flow-step:hover { transform: translateY(-5px); box-shadow: var(--sh-card); }
.flow-step::after {
  content: ''; position: absolute; right: -12px; top: 46%;
  width: 12px; height: 1px; background: var(--c-blue-200);
}
.flow-step:last-child::after { display: none; }
.flow-num {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  color: #fff; font-size: .9rem; font-weight: 700; margin-bottom: 16px;
}
.flow-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
.flow-step p { font-size: .88rem; color: var(--c-ink-500); }

/* ---------- 技术栈芯片墙 ---------- */
.chip-wall {
  margin-top: 36px;
  display: flex; flex-wrap: wrap; gap: 10px;
}
.tech-chip {
  padding: 9px 16px;
  border-radius: var(--r-full);
  font-size: .85rem; font-weight: 500;
  color: var(--c-ink-600);
  background: var(--c-glass);
  border: 1px solid rgba(91, 143, 249, .16);
  transition: all .3s ease;
}
.tech-chip:hover {
  color: #fff;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  border-color: transparent;
  transform: translateY(-2px);
}

/* ---------- 数据条 ---------- */
.stat-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  padding: 30px 32px; margin-bottom: 56px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
}
.stat-strip-item { text-align: center; }
.stat-strip .stat-num { font-size: 2.4rem; font-weight: 700; color: var(--c-ink-900); }
.stat-strip .stat-num .num {
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-strip .stat-label { margin-top: 6px; font-size: .82rem; color: var(--c-ink-500); }

/* ---------- 筛选条 ---------- */
.filter-bar {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-bottom: 36px;
}
.filter-chip {
  padding: 9px 18px;
  border-radius: var(--r-full);
  font-size: .88rem; font-weight: 500;
  font-family: inherit;
  color: var(--c-ink-600);
  background: var(--c-glass);
  border: 1px solid rgba(91, 143, 249, .16);
  cursor: pointer;
  transition: all .3s ease;
}
.filter-chip:hover { color: var(--c-blue-600); border-color: rgba(91, 143, 249, .4); }
.filter-chip.on {
  color: #fff; border-color: transparent;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 8px 20px -8px rgba(59, 111, 240, .55);
}

/* ---------- 案例页网格：两列，卡片结构与首页完全一致 ---------- */
.case-page-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  align-items: stretch;
}
/* 画幅跟随全局 --visual-ratio，与详情页顶图一致 */
.case-page-grid .case-meta { padding: 26px 30px 30px; }
.case-page-grid .case-card h3 { font-size: 1.34rem; margin-top: 12px; }
.case-page-grid .case-index { font-size: 3rem; top: 20px; right: 28px; }
.case-page-grid .case-info { margin-top: 16px; }
/* 悬停聚焦：其余卡片退后 */
.case-page-grid:hover .case-card:not(:hover) { opacity: .55; }

/* ---------- 加载更多 ---------- */
.more-hidden { display: none !important; }
.load-more-wrap {
  display: flex;
  justify-content: center;
  margin-top: 52px;
}
.load-more {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 17px 38px;
  border-radius: var(--r-full);
  border: 1px solid rgba(31, 42, 68, .08);
  background: var(--c-glass);
  color: var(--c-ink-900);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: .02em;
  cursor: pointer;
  box-shadow: var(--sh-soft);
  transition: transform .35s cubic-bezier(.2, .85, .25, 1),
              box-shadow .35s ease,
              border-color .35s ease,
              color .35s ease;
}
.load-more .plus {
  display: grid;
  place-items: center;
  transition: transform .45s cubic-bezier(.34, 1.4, .64, 1);
}
.load-more:hover {
  transform: translateY(-2px);
  border-color: rgba(91, 143, 249, .4);
  color: var(--c-blue-600);
  box-shadow: 0 18px 36px -16px rgba(31, 60, 184, .35);
}
.load-more:hover .plus { transform: rotate(90deg); }
.load-more:active { transform: translateY(0); }
.load-more:focus-visible {
  outline: 2px solid var(--c-blue-500);
  outline-offset: 3px;
}

/* ---------- 客户评价 ---------- */
.quote-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-top: 36px;
}
.quote-card {
  position: relative;
  padding: 32px 30px 28px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  transition: transform .4s ease, box-shadow .4s ease;
}
.quote-card:hover { transform: translateY(-4px); box-shadow: var(--sh-card); }
.quote-mark {
  position: absolute; top: 14px; right: 26px;
  font-size: 4rem; line-height: 1; font-weight: 700;
  color: var(--c-blue-200); opacity: .5;
}
.quote-card blockquote {
  position: relative; font-size: 1rem; line-height: 1.75; color: var(--c-ink-700);
}
.quote-card figcaption {
  margin-top: 22px; padding-top: 18px;
  border-top: 1px dashed rgba(91, 143, 249, .22);
  display: grid; gap: 3px;
}
.quote-card figcaption strong { font-size: .92rem; color: var(--c-ink-800); }
.quote-card figcaption span { font-size: .8rem; color: var(--c-ink-400); }

/* ---------- 关于页 ---------- */
.about-prose {
  max-width: 780px; display: grid; gap: 18px;
  margin-bottom: 20px;
}
.about-prose p { font-size: 1.05rem; line-height: 1.85; color: var(--c-ink-600); }

.value-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-top: 36px;
}
.value-card {
  padding: 32px 30px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  transition: transform .4s ease, box-shadow .4s ease;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--sh-card); }
.value-dot {
  display: block; width: 12px; height: 12px; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 0 0 5px rgba(91, 143, 249, .14);
  margin-bottom: 20px;
}
.value-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.value-card p { font-size: .95rem; color: var(--c-ink-500); line-height: 1.75; }

.timeline { margin-top: 40px; display: grid; gap: 0; }
.tl-item {
  display: grid; grid-template-columns: 130px 1fr; gap: 28px;
  padding: 24px 0;
  border-top: 1px solid rgba(91, 143, 249, .16);
}
.tl-item:last-child { border-bottom: 1px solid rgba(91, 143, 249, .16); }
.tl-year {
  font-size: 1.5rem; font-weight: 700; letter-spacing: -.02em;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.tl-body h4 { font-size: 1.05rem; margin-bottom: 6px; }
.tl-body p { font-size: .93rem; color: var(--c-ink-500); }

/* ---------- 联系页 ---------- */
.page-contact { align-items: start; }
.contact-info { display: grid; gap: 14px; }
.info-card {
  padding: 22px 24px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  transition: transform .35s ease, box-shadow .35s ease;
}
.info-card:hover { transform: translateY(-3px); box-shadow: var(--sh-card); }
.info-label {
  display: block; font-size: .7rem; font-weight: 600;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--c-ink-400); margin-bottom: 8px;
}
.info-value {
  display: block; font-size: 1.05rem; font-weight: 600; color: var(--c-ink-800);
  transition: color .25s ease;
}
a.info-value:hover { color: var(--c-blue-500); }
.info-card p { margin-top: 8px; font-size: .85rem; color: var(--c-ink-500); }

.faq-list { margin-top: 36px; display: grid; gap: 12px; }
.faq-item {
  border-radius: var(--r-md);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--sh-soft);
  overflow: hidden;
  transition: border-color .3s ease;
}
.faq-item[open] { border-color: rgba(91, 143, 249, .3); }
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 20px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-weight: 600; font-size: 1rem; color: var(--c-ink-800);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-icon {
  flex: none; width: 18px; height: 18px; position: relative;
  border-radius: 50%; border: 1px solid var(--c-blue-300);
  transition: transform .3s ease, background .3s ease;
}
.faq-icon::before, .faq-icon::after {
  content: ''; position: absolute; background: var(--c-blue-500);
  left: 50%; top: 50%; transform: translate(-50%, -50%);
}
.faq-icon::before { width: 8px; height: 1.5px; }
.faq-icon::after { width: 1.5px; height: 8px; transition: opacity .3s ease; }
.faq-item[open] .faq-icon { background: var(--c-blue-500); transform: rotate(90deg); }
.faq-item[open] .faq-icon::before,
.faq-item[open] .faq-icon::after { background: #fff; }
.faq-item[open] .faq-icon::after { opacity: 0; }
.faq-item > p {
  padding: 0 24px 22px;
  font-size: .95rem; line-height: 1.8; color: var(--c-ink-500);
}

/* ---------- CTA 通栏 ---------- */
.cta-band { margin-top: 72px; }
.cta-band-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  padding: 44px 48px;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, rgba(59, 111, 240, .10) 0%, rgba(6, 182, 212, .12) 100%);
  border: 1px solid rgba(91, 143, 249, .22);
  box-shadow: var(--sh-soft);
}
.cta-band h3 { font-size: 1.6rem; margin-bottom: 8px; }
.cta-band p { font-size: .98rem; color: var(--c-ink-500); }

/* ---------- 导航当前页标记 ---------- */
.rail-items a.is-current { color: var(--c-blue-600); font-weight: 600; }
.rail-items a.is-current::after {
  content: ''; position: absolute; left: 50%; bottom: 2px;
  width: 16px; height: 2px; border-radius: 2px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--c-blue-500), var(--c-cyan-500));
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .quote-grid, .value-grid { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .flow-step:nth-child(3)::after { display: none; }
}
@media (max-width: 880px) {
  .page-section { padding-top: 132px; }
  /* 窄屏下两列过挤，案例页退化为单列 */
  .case-page-grid { grid-template-columns: 1fr; gap: 20px; }
  .svc-row { grid-template-columns: 1fr; gap: 22px; padding: 26px 24px; }
  .svc-row-side {
    padding-left: 0; padding-top: 18px;
    border-left: none; border-top: 1px solid rgba(91, 143, 249, .18);
    grid-template-columns: 1fr 1fr;
  }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: 1fr; }
  .flow-step::after { display: none; }
  .tl-item { grid-template-columns: 90px 1fr; gap: 16px; }
  .cta-band-inner { flex-direction: column; align-items: flex-start; padding: 32px 26px; }
}
@media (max-width: 640px) {
  .quote-grid, .value-grid { grid-template-columns: 1fr; }
}

/* ---------- 深色主题 ---------- */
:root[data-theme="dark"] .svc-row,
:root[data-theme="dark"] .flow-step,
:root[data-theme="dark"] .stat-strip,
:root[data-theme="dark"] .quote-card,
:root[data-theme="dark"] .value-card,
:root[data-theme="dark"] .info-card,
:root[data-theme="dark"] .faq-item {
  background: rgba(16, 24, 48, .55);
  border-color: rgba(255, 255, 255, .10);
  box-shadow: 0 12px 40px -12px rgba(0, 0, 0, .55);
}
:root[data-theme="dark"] .svc-row-num { color: var(--c-blue-700); }
:root[data-theme="dark"] .svc-deliver,
:root[data-theme="dark"] .tl-item { border-color: rgba(255, 255, 255, .10); }
:root[data-theme="dark"] .quote-mark { color: var(--c-blue-800); }
:root[data-theme="dark"] .faq-item summary,
:root[data-theme="dark"] .info-value { color: var(--c-ink-200); }
:root[data-theme="dark"] .cta-band-inner {
  background: linear-gradient(135deg, rgba(59, 111, 240, .16) 0%, rgba(6, 182, 212, .14) 100%);
  border-color: rgba(255, 255, 255, .10);
}
:root[data-theme="dark"] .rail-items a.is-current { color: #9CC0FF; }
:root[data-theme="dark"] .tech-chip:hover { color: #fff; }
:root[data-theme="dark"] .load-more {
  border-color: rgba(255, 255, 255, .12);
  color: var(--c-ink-800);
}
:root[data-theme="dark"] .load-more:hover { color: #9CC0FF; border-color: rgba(91, 143, 249, .45); }

/* 列表筛选：隐藏态 */
.filter-hidden { display: none !important; }
.filter-in { animation: filterIn .45s cubic-bezier(.22,.8,.32,1) both; }
@keyframes filterIn {
  from { opacity: 0; transform: translateY(14px) scale(.985); }
  to   { opacity: 1; transform: none; }
}

/* ============ 案例详情页 ============ */
.cd-hero-visual {
  position: relative;
  aspect-ratio: var(--visual-ratio);
  height: auto;
  margin-top: 40px;
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--sh-card);
}
.cd-hero-visual .case-visual { height: 100%; }

/* ---------- 元信息条 ---------- */
.cd-meta-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 40px;
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
}
.cd-meta-bar .cell {
  padding: 20px 26px;
  border-left: 1px solid rgba(91, 143, 249, .16);
}
.cd-meta-bar .cell:first-child { border-left: none; }
.cd-meta-bar .k {
  font-size: .74rem; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--c-ink-400);
}
.cd-meta-bar .v {
  margin-top: 7px;
  font-size: 1rem; font-weight: 600;
  color: var(--c-ink-900);
}

/* ---------- 章节块 ---------- */
.cd-block { margin-top: clamp(56px, 7vw, 92px); }
.cd-block > h2 {
  font-size: clamp(1.45rem, 2.2vw, 1.95rem);
  font-weight: 700; line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--c-ink-900);
}
.cd-block > h2::before {
  content: "";
  display: block;
  width: 34px; height: 3px;
  margin-bottom: 16px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--c-blue-500), var(--c-cyan-500));
}
.cd-lead {
  margin-top: 18px;
  max-width: 880px;
  font-size: 1.06rem; line-height: 1.9;
  color: var(--c-ink-600);
}
.cd-body p {
  margin-top: 16px;
  max-width: 880px;
  font-size: .98rem; line-height: 1.9;
  color: var(--c-ink-500);
}

/* ---------- 正文插图 ---------- */
.cd-figure {
  margin-top: 30px;
  height: clamp(200px, 22vw, 300px);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
}
.cd-figure .case-visual { height: 100%; }

/* ---------- 用户与业务问题（双栏） ---------- */
.problem-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 22px;
  margin-top: 26px;
}
.problem-card {
  padding: 28px 30px 30px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
}
.problem-card h3 {
  display: flex; align-items: center; gap: 12px;
  font-size: 1.05rem; font-weight: 600;
  color: var(--c-ink-900);
}
.problem-card .tag {
  padding: 4px 11px;
  border-radius: var(--r-full);
  font-size: .72rem; font-weight: 500;
  color: var(--c-blue-700);
  background: rgba(91, 143, 249, .12);
}
.problem-card p {
  margin-top: 14px;
  font-size: .95rem; line-height: 1.85;
  color: var(--c-ink-500);
}

/* ---------- 服务清单 ---------- */
.cd-list {
  margin-top: 24px;
  display: grid; gap: 14px;
  max-width: 900px;
}
.cd-list li {
  display: flex; gap: 14px; align-items: flex-start;
  font-size: .97rem; line-height: 1.8;
  color: var(--c-ink-600);
}
.cd-list li::before {
  content: "";
  flex: none;
  width: 18px; height: 18px;
  margin-top: 5px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 0 0 4px rgba(91, 143, 249, .14);
}

/* ---------- 方法与关键决策 ---------- */
.decision-list { margin-top: 28px; display: grid; gap: 18px; }
.decision-item {
  display: grid; grid-template-columns: 58px 1fr; gap: 20px;
  padding: 26px 28px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
  transition: transform .35s ease, box-shadow .35s ease;
}
.decision-item:hover { transform: translateY(-3px); box-shadow: var(--sh-card); }
.decision-item .no {
  font-size: 1.6rem; font-weight: 700; line-height: 1;
  color: transparent;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  -webkit-background-clip: text; background-clip: text;
}
.decision-item h3 { font-size: 1.06rem; font-weight: 600; color: var(--c-ink-900); }
.decision-item p { margin-top: 10px; font-size: .95rem; line-height: 1.85; color: var(--c-ink-500); }

/* ---------- 解决方案 ---------- */
.solution-grid {
  margin-top: 26px;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.solution-card {
  padding: 26px 28px 28px;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, rgba(91, 143, 249, .09) 0%, rgba(6, 182, 212, .07) 100%);
  border: 1px solid rgba(91, 143, 249, .18);
  transition: transform .35s ease;
}
.solution-card:hover { transform: translateY(-3px); }
.solution-card h4 { font-size: 1.02rem; font-weight: 600; color: var(--c-ink-900); }
.solution-card p { margin-top: 10px; font-size: .94rem; line-height: 1.85; color: var(--c-ink-600); }

/* ---------- 核心转变 ---------- */
.shift-band {
  margin-top: clamp(56px, 7vw, 92px);
  padding: 44px 46px;
  border-radius: var(--r-xl);
  background: linear-gradient(135deg, rgba(59, 111, 240, .10) 0%, rgba(6, 182, 212, .12) 100%);
  border: 1px solid rgba(91, 143, 249, .22);
}
.shift-band .k {
  font-size: .76rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase;
  color: var(--c-blue-600);
}
.shift-flow {
  margin-top: 18px;
  display: flex; align-items: center; flex-wrap: wrap; gap: 18px;
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  font-weight: 600; line-height: 1.5;
}
.shift-flow .from {
  color: var(--c-ink-400);
  text-decoration: line-through;
  text-decoration-color: rgba(91, 143, 249, .55);
  text-decoration-thickness: 2px;
}
.shift-flow .arrow {
  flex: none;
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 10px 22px -8px rgba(59, 111, 240, .8);
}
.shift-flow .to {
  color: transparent;
  background: linear-gradient(135deg, var(--c-blue-600), var(--c-cyan-500));
  -webkit-background-clip: text; background-clip: text;
}

/* ---------- 项目成果 ---------- */
.result-grid {
  margin-top: 28px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.result-cell {
  padding: 26px 22px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
  text-align: center;
}
.result-cell .num {
  font-size: 2.05rem; font-weight: 700; letter-spacing: -0.02em;
  color: transparent;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  -webkit-background-clip: text; background-clip: text;
}
.result-cell .num small { font-size: .82rem; font-weight: 600; margin-left: 3px; }
.result-cell .lab { margin-top: 10px; font-size: .85rem; line-height: 1.6; color: var(--c-ink-500); }

/* ---------- 客户声音 ---------- */
.case-quote {
  position: relative;
  margin-top: 26px;
  padding: 44px 46px 40px;
  border-radius: var(--r-xl);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
  overflow: hidden;
}
.case-quote .qm {
  position: absolute;
  top: 6px; left: 26px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 5rem; line-height: 1;
  color: var(--c-blue-500);
  opacity: .14;
  pointer-events: none;
}
.case-quote p {
  position: relative;
  font-size: 1.06rem; line-height: 1.9;
  color: var(--c-ink-700);
}
.case-quote .by { margin-top: 22px; font-size: .9rem; color: var(--c-ink-500); }
.case-quote .by b { display: block; font-weight: 600; color: var(--c-ink-900); }

/* ---------- 上下篇 ---------- */
.case-nav {
  margin-top: clamp(56px, 7vw, 88px);
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
}
.case-nav a {
  display: block;
  padding: 24px 28px;
  border-radius: var(--r-lg);
  background: var(--c-glass);
  border: 1px solid rgba(255, 255, 255, .7);
  box-shadow: var(--sh-soft);
  transition: transform .35s ease, border-color .35s ease, box-shadow .35s ease;
}
.case-nav a:hover {
  transform: translateY(-3px);
  border-color: rgba(91, 143, 249, .34);
  box-shadow: var(--sh-card);
}
.case-nav .dir {
  font-size: .74rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  color: var(--c-ink-400);
}
.case-nav .nm {
  margin-top: 8px;
  font-size: 1.02rem; font-weight: 600;
  color: var(--c-ink-900);
}
.case-nav a.next { text-align: right; }

/* ---------- 详情页响应式 ---------- */
@media (max-width: 1080px) {
  .cd-meta-bar { grid-template-columns: repeat(2, 1fr); }
  .cd-meta-bar .cell:nth-child(3) { border-left: none; }
  .cd-meta-bar .cell:nth-child(n+3) { border-top: 1px solid rgba(91, 143, 249, .16); }
  .result-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 880px) {
  .problem-grid, .solution-grid, .case-nav { grid-template-columns: 1fr; }
  .case-nav a.next { text-align: left; }
  .cd-hero-visual { margin-top: 30px; }
  .shift-band { padding: 32px 26px; }
  .case-quote { padding: 36px 26px 32px; }
  .decision-item { grid-template-columns: 42px 1fr; gap: 14px; padding: 22px 22px 24px; }
}
@media (max-width: 640px) {
  .cd-meta-bar { grid-template-columns: 1fr; }
  .cd-meta-bar .cell { border-left: none; border-top: 1px solid rgba(91, 143, 249, .16); }
  .cd-meta-bar .cell:first-child { border-top: none; }
}

/* ---------- 详情页深色主题 ---------- */
:root[data-theme="dark"] .cd-meta-bar,
:root[data-theme="dark"] .problem-card,
:root[data-theme="dark"] .decision-item,
:root[data-theme="dark"] .result-cell,
:root[data-theme="dark"] .case-quote,
:root[data-theme="dark"] .case-nav a,
:root[data-theme="dark"] .cd-figure {
  background: var(--c-glass);
  border-color: rgba(255, 255, 255, .08);
}
:root[data-theme="dark"] .cd-meta-bar .cell,
:root[data-theme="dark"] .cd-meta-bar .cell:nth-child(n+3) {
  border-color: rgba(255, 255, 255, .08);
}
:root[data-theme="dark"] .problem-card .tag {
  color: #9CC0FF;
  background: rgba(91, 143, 249, .16);
}
:root[data-theme="dark"] .solution-card {
  background: linear-gradient(160deg, rgba(91, 143, 249, .14) 0%, rgba(6, 182, 212, .10) 100%);
  border-color: rgba(255, 255, 255, .08);
}

/* ---------- 案例卡片链接态 ---------- */
a.case-wrap { display: block; color: inherit; text-decoration: none; }
a.case-wrap:focus-visible { outline: 2px solid var(--c-blue-500); outline-offset: 6px; border-radius: var(--r-xl); }

/* ---------- 详情页左侧目录 ---------- */
.cd-layout {
  display: grid;
  grid-template-columns: 216px minmax(0, 1fr);
  gap: clamp(36px, 4.5vw, 72px);
  align-items: start;
  margin-top: clamp(56px, 7vw, 92px);
}
.cd-main > .cd-block:first-child { margin-top: 0; }
.cd-main .cd-block,
.cd-main .shift-band { scroll-margin-top: 132px; }

.cd-toc {
  position: sticky;
  top: 118px;
}
.cd-toc-title {
  font-size: .78rem; font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-ink-400);
  margin-bottom: 14px;
}
.cd-toc-nav {
  display: grid; gap: 2px;
  border-left: 1px solid rgba(91, 143, 249, .18);
}
.cd-toc-nav a {
  position: relative;
  display: block;
  padding: 8px 4px 8px 18px;
  font-size: .88rem; line-height: 1.55;
  color: var(--c-ink-500);
  text-decoration: none;
  transition: color .25s ease;
}
.cd-toc-nav a::before {
  content: "";
  position: absolute;
  left: -1px; top: 7px; bottom: 7px;
  width: 2px; border-radius: 2px;
  background: linear-gradient(180deg, var(--c-blue-500), var(--c-cyan-500));
  opacity: 0;
  transition: opacity .25s ease;
}
.cd-toc-nav a:hover { color: var(--c-ink-800); }
.cd-toc-nav a.is-active {
  color: var(--c-ink-900);
  font-weight: 600;
}
.cd-toc-nav a.is-active::before { opacity: 1; }
.cd-toc-nav a i {
  font-style: normal;
  margin-right: 2px;
  font-size: .8rem;
  color: var(--c-ink-400);
  transition: color .25s ease;
}
.cd-toc-nav a.is-active i { color: var(--c-blue-600); }

@media (max-width: 1080px) {
  .cd-layout { grid-template-columns: 1fr; }
  .cd-toc { display: none; }
}

/* ---------- 详情页目录深色主题 ---------- */
:root[data-theme="dark"] .cd-toc-nav { border-left-color: rgba(255, 255, 255, .1); }
:root[data-theme="dark"] .cd-toc-nav a.is-active { color: #9CC0FF; }
:root[data-theme="dark"] .cd-toc-nav a.is-active i { color: #9CC0FF; }

/* ---------- 资讯列表卡片链接态 ---------- */
a.news-item { color: inherit; text-decoration: none; }
a.news-item:focus-visible { outline: 2px solid var(--c-blue-500); outline-offset: 4px; }

/* ---------- 资讯详情：作者行 ---------- */
.nd-byline {
  display: flex; align-items: center; gap: 12px;
  margin-top: 26px;
}
.nd-byline .ava {
  flex: none;
  display: grid; place-items: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  font-size: .95rem; font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, var(--c-blue-500), var(--c-cyan-500));
  box-shadow: 0 8px 18px -8px rgba(59, 111, 240, .8);
}
.nd-byline .who { display: grid; gap: 3px; }
.nd-byline .who b { font-size: .92rem; font-weight: 600; color: var(--c-ink-900); }
.nd-byline .who span { font-size: .8rem; color: var(--c-ink-400); }

/* ---------- 资讯详情：文中金句 ---------- */
.nd-quote {
  position: relative;
  margin-top: 26px;
  padding: 4px 0 4px 24px;
  border-left: 3px solid transparent;
  border-image: linear-gradient(180deg, var(--c-blue-500), var(--c-cyan-500)) 1;
}
.nd-quote p {
  font-size: 1.08rem; line-height: 1.85; font-weight: 500;
  color: var(--c-ink-800);
}

/* ---------- 资讯详情：导语强调 ---------- */
.cd-main > .cd-block:first-child .cd-lead {
  font-size: 1.1rem;
  color: var(--c-ink-700);
}

:root[data-theme="dark"] .nd-quote p { color: var(--c-ink-100); }
:root[data-theme="dark"] .nd-byline .who b { color: var(--c-ink-100); }

/* ---------- 品牌 Logo 图片 ---------- */
.brand-logo {
  display: block;
  height: calc(30px - var(--sp) * 2px);
  width: auto;
  transition: filter .3s ease, opacity .3s ease;
}
.rail-brand:hover .brand-logo { filter: brightness(1.18) saturate(1.08); }

.footer-brand .brand-logo { height: 34px; }
.footer-brand .brand:hover .brand-logo { filter: brightness(1.18) saturate(1.08); }

/* 深色主题下提亮，保证对比度 */
:root[data-theme="dark"] .brand-logo { filter: brightness(2.15) saturate(1.1); }
:root[data-theme="dark"] .rail-brand:hover .brand-logo,
:root[data-theme="dark"] .footer-brand .brand:hover .brand-logo { filter: brightness(2.4) saturate(1.15); }

@media (prefers-reduced-motion: reduce) {
  .brand-logo { transition: none; }
}

/* ---------- 表单下拉自定义箭头（较原生位置左移 10px） ---------- */
.form-field select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 42px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23333' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 26px center;
  background-size: 12px 8px;
  cursor: pointer;
}

:root[data-theme="dark"] .form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23AEBBD6' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}

/* ==========================================================
   封面图（后台上传，覆盖案例卡 / 资讯列表 / 详情页视觉）
   ========================================================== */

/* 案例卡：真实封面图完整呈现（不裁剪），无图时保持原有 CSS 渐变 */
.case-visual-img {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform .8s cubic-bezier(.2, .85, .25, 1);
}
.case-visual-cover { background: #EEF2F7; }
.case-card:hover .case-visual-img { transform: scale(1.04); }

/* 资讯列表：统一保留缩略图列，保证所有条目对齐 */
.news-item { grid-template-columns: 140px 96px 1fr auto; gap: 24px; }
.news-thumb {
  position: relative;
  flex: none;
  width: 96px;
  aspect-ratio: var(--visual-ratio);
  height: auto;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(135deg, #DCE8FE 0%, #5B8FF9 100%);
}
.news-thumb img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform .6s cubic-bezier(.2, .85, .25, 1);
}
.news-item:hover .news-thumb img { transform: scale(1.06); }
.news-thumb-fallback { display: flex; align-items: center; justify-content: center; }
.news-thumb-fallback span {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.86);
}

@media (max-width: 720px) {
  .news-item { grid-template-columns: 1fr; gap: 14px; }
  .news-thumb { width: 100%; }
}

/* 详情页顶图：有封面时由 .cd-hero-visual 承载，尺寸由该组件自身控制 */
:root[data-theme="dark"] .case-visual-cover { background: #1A2333; }

@media (prefers-reduced-motion: reduce) {
  .case-visual-img, .news-thumb img { transition: none; }
  .case-card:hover .case-visual-img, .news-item:hover .news-thumb img { transform: none; }
}