/* ============================================================
   十域科技 XYZ10 Cloud · 官网样式
   设计系统：近黑底 + 薄荷/青绿高光，零外部依赖
   ============================================================ */

:root {
  --bg:        #05080a;
  --bg-1:      #080d11;
  --bg-2:      #0b1318;
  --panel:     #0d161b;
  --panel-2:   #101e24;
  --line:      rgba(29, 233, 182, .14);
  --line-soft: rgba(255, 255, 255, .07);
  --teal:      #1de9b6;
  --teal-d:    #00bfa5;
  --teal-glow: rgba(29, 233, 182, .35);
  --text:      #e8f1ee;
  --text-2:    #b3c2bd;
  --muted:     #6d807b;
  --white:     #ffffff;

  --maxw: 1180px;
  --r: 14px;
  --r-lg: 22px;

  --f-cjk: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --f: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, var(--f-cjk);

  --ease: cubic-bezier(.16, 1, .3, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--f);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  /* 全站正文里的英文统一为 Keynote 式小型大写（保留首字母大写，
     中文与数字不受影响）。标签类元素另用 all-small-caps 覆盖。 */
  font-variant-caps: small-caps;
  -webkit-font-feature-settings: normal;
          font-feature-settings: normal;
}


a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---------- 通用排版 ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

.eyebrow {
  font-size: 13px; letter-spacing: .22em; font-variant: all-small-caps;
  color: var(--teal); font-weight: 600; margin-bottom: 18px;
  display: inline-flex; align-items: center; gap: 10px;
}

/* Keynote 风格小型大写：用于英文展示文字。
   只用 font-variant-caps，让浏览器对系统字体自动合成小型大写；
   切勿叠加 font-feature-settings——那会改用字体自带 OpenType 表，
   而 SF Pro 等系统字体无该表，反而失效。 */
.smallcaps, .product h3 .en, .trust-label span, .hero .tag, .product-kicker .idx,
.case .ind, .hl-card .yr, .tl-card .tag-sm {
  font-variant-caps: all-small-caps;
  -webkit-font-feature-settings: normal;
          font-feature-settings: normal;
}
.eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--teal); display: inline-block; }

.section { padding: 120px 0; position: relative; }
.section-head { max-width: 760px; margin-bottom: 64px; }
.section-head h2 {
  font-size: clamp(28px, 4vw, 44px); line-height: 1.2; font-weight: 700; letter-spacing: -.01em;
}
.section-head p { margin-top: 18px; color: var(--text-2); font-size: 17px; }

.text-teal { color: var(--teal); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s, color .3s;
  border: 1px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--teal); color: #03100c; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px -8px var(--teal-glow); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255,255,255,.02); }
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .4s, border-color .4s, backdrop-filter .4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(5, 8, 10, .82);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line-soft);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.logo { display: flex; align-items: center; gap: 12px; }
.logo .logo-img { height: 30px; width: auto; display: block; }
.foot-brand .logo .logo-img { height: 28px; }

.nav-links { display: flex; align-items: center; gap: 34px; }
.nav-links a { font-size: 15px; color: var(--text-2); transition: color .25s; position: relative; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px;
  background: var(--teal); transition: width .3s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }

.nav-right { display: flex; align-items: center; gap: 18px; }
.lang-toggle {
  font-size: 13px; color: var(--text-2); cursor: pointer; letter-spacing: .05em;
  border: 1px solid var(--line-soft); border-radius: 999px; padding: 6px 14px;
  background: none; font-family: var(--f); transition: border-color .25s, color .25s;
}
.lang-toggle:hover { border-color: var(--teal); color: var(--teal); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text); transition: .3s; }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh; display: flex; align-items: center;
  position: relative; overflow: hidden; padding-top: 72px;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    radial-gradient(900px 600px at 70% 12%, rgba(29,233,182,.16), transparent 60%),
    radial-gradient(700px 500px at 15% 85%, rgba(0,191,165,.10), transparent 60%);
}
.hero-orbit {
  position: absolute; top: 50%; right: -180px; transform: translateY(-50%);
  width: 760px; height: 760px; z-index: 0; opacity: .6;
  pointer-events: none;
}
/* 实线圆环：每环带一颗绕行光点产生动感 */
.hero-orbit span {
  position: absolute; inset: 0; border: 1px solid var(--line); border-radius: 50%;
  animation: spin 60s linear infinite;
}
.hero-orbit span::before {
  content: ""; position: absolute; top: -5px; left: 50%; width: 9px; height: 9px;
  margin-left: -4.5px; border-radius: 50%; background: var(--teal);
  box-shadow: 0 0 14px 2px var(--teal-glow);
}
.hero-orbit span:nth-child(2) { inset: 90px; border-color: rgba(29,233,182,.12); animation-duration: 42s; animation-direction: reverse; }
.hero-orbit span:nth-child(3) { inset: 190px; border-color: rgba(29,233,182,.20); animation-duration: 30s; }
/* 雷达式扫描光束 */
.hero-orbit::before {
  content: ""; position: absolute; inset: 60px; border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0deg, rgba(29,233,182,.16) 40deg, transparent 80deg);
  -webkit-mask: radial-gradient(circle, transparent 38%, #000 39%);
          mask: radial-gradient(circle, transparent 38%, #000 39%);
  animation: spin 14s linear infinite;
}
/* 中心辉光呼吸 */
.hero-orbit::after {
  content: ""; position: absolute; inset: 280px; border-radius: 50%;
  background: radial-gradient(circle, var(--teal-glow), transparent 70%); filter: blur(20px);
  animation: breathe 6s ease-in-out infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes breathe {
  0%, 100% { opacity: .55; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.12); }
}

.hero-content { position: relative; z-index: 2; max-width: 820px; }
.hero .tag {
  display: inline-flex; align-items: center; gap: 10px; font-size: 13px; letter-spacing: .14em;
  color: var(--teal); border: 1px solid var(--line); border-radius: 999px; padding: 7px 16px;
  background: rgba(29,233,182,.05); margin-bottom: 30px;
  /* 真正的小型大写：用 CSS2 经典 font-variant: small-caps（各浏览器含 Safari 都可靠合成
     smcp），不要用较新的 all-small-caps（Safari 可能不合成而失效）。保留原文混合大小写，
     首字母为大写、其余字母呈小型大写。 */
  text-transform: none;
  font-variant: small-caps;
  font-variant-caps: small-caps;
  font-size: 13px;
}
.hero .tag .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 10px var(--teal); }
.hero h1 {
  font-size: clamp(42px, 7.5vw, 86px); line-height: 1.04; font-weight: 800; letter-spacing: -.02em;
}
.hero h1 .grad {
  background: linear-gradient(100deg, var(--teal), #7af5d8 60%, var(--white));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub {
  margin-top: 18px; font-size: clamp(17px, 2.2vw, 22px); font-weight: 600; color: var(--text);
  letter-spacing: .02em;
}
.hero-sub .text-teal { font-weight: 700; }
.hero .lead {
  margin-top: 20px; font-size: clamp(16px, 2vw, 20px); color: var(--text-2); max-width: 620px;
}
.hero .lead b { color: var(--text); font-weight: 600; }
.hero-cta { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  position: relative; z-index: 2; display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 24px; margin-top: 76px; padding-top: 34px; 
  max-width: 980px;
}
.hero-stats .num { font-size: clamp(22px, 2.6vw, 32px); font-weight: 800; color: var(--white); letter-spacing: -.01em; }
.hero-stats .num em { color: var(--teal); font-style: normal; }
.hero-stats .lbl { font-size: 12.5px; color: var(--muted); margin-top: 4px; line-height: 1.45; }

.scroll-hint {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); z-index: 2;
  font-size: 12px; letter-spacing: .2em; color: var(--muted); writing-mode: vertical-lr;
  display: flex; align-items: center; gap: 12px;
}
.scroll-hint::after { content: ""; width: 1px; height: 40px; background: linear-gradient(var(--teal), transparent); }

/* ============================================================
   关于 / 能力
   ============================================================ */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.about-lead { font-size: clamp(20px, 2.4vw, 27px); line-height: 1.5; font-weight: 500; }
.about-lead .hl { color: var(--teal); }
.about-text { margin-top: 22px; color: var(--text-2); font-size: 16px; }
.about-text + .about-text { margin-top: 14px; }

.cap-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; grid-auto-rows: 1fr; }
.cap-card {
  background: linear-gradient(160deg, var(--panel), var(--bg-1));
  border: 1px solid var(--line-soft); border-radius: var(--r); padding: 24px;
  transition: border-color .3s, transform .3s var(--ease);
}
.cap-card:hover { border-color: var(--line); transform: translateY(-4px); }
.cap-card .ic { width: 40px; height: 40px; border-radius: 10px; background: rgba(29,233,182,.1);
  display: grid; place-items: center; color: var(--teal); margin-bottom: 14px; }
.cap-card h4 { font-size: 17px; margin-bottom: 6px; }
.cap-card p { font-size: 14px; color: var(--muted); line-height: 1.6; }

/* ============================================================
   时间轴 历程
   ============================================================ */
.timeline-sec { background:
   radial-gradient(700px 400px at 80% 0%, rgba(29,233,182,.06), transparent 60%), var(--bg-1); }
.timeline { position: relative; margin: 0 auto; padding: 20px 0; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; transform: translateX(-50%);
  background: linear-gradient(var(--line-soft), var(--line), var(--line-soft));
}
.timeline-progress {
  position: absolute; left: 50%; top: 0; width: 2px; transform: translateX(-50%);
  background: linear-gradient(var(--teal), var(--teal-d)); height: 0; box-shadow: 0 0 12px var(--teal-glow);
  transition: height .15s linear;
}
.tl-item { position: relative; width: 50%; padding: 22px 0; }
/* 外侧 padding 0 → 卡片边缘贴齐 .wrap 左右边缘，与其他区块对齐；内侧留出到中线的间距 */
.tl-item:nth-child(odd) { left: 0; text-align: right; padding-right: 56px; }
.tl-item:nth-child(even) { left: 50%; padding-left: 56px; }
.tl-dot {
  position: absolute; top: 30px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg); border: 2px solid var(--teal); z-index: 2;
}
.tl-item:nth-child(odd) .tl-dot { right: -7px; }
.tl-item:nth-child(even) .tl-dot { left: -7px; }
.tl-card {
  background: linear-gradient(160deg, var(--panel-2), var(--bg-2));
  border: 1px solid var(--line-soft); border-radius: var(--r); padding: 22px 24px;
  transition: border-color .3s, transform .3s var(--ease);
}
.tl-card:hover { border-color: var(--teal); transform: translateY(-3px); }
.tl-year { font-size: 30px; font-weight: 800; color: var(--teal); letter-spacing: .02em; line-height: 1; }
.tl-card h4 { font-size: 17px; margin: 10px 0 8px; }
.tl-card p { font-size: 14.5px; color: var(--text-2); }
.tl-card .tag-sm { display:inline-block; font-size:12px; letter-spacing:.06em; color:var(--teal);
  border:1px solid var(--line); border-radius:999px; padding:2px 10px; margin-top:12px; }

/* ============================================================
   三大事业线 / 产品
   ============================================================ */
.product { padding: 70px 0; border-top: 1px solid var(--line-soft); position: relative; overflow: hidden; }
.product-inner { position: relative; z-index: 2; }
.product-text { max-width: 620px; }   /* 三个产品文字统一靠左 */
.product-kicker { display:flex; align-items:center; gap:14px; margin-bottom:20px; }
.product-kicker .idx { font-size: 13px; font-weight: 700; color: var(--teal); letter-spacing:.1em; }
.product-kicker .line-name { font-size: 13px; color: var(--muted); letter-spacing:.16em; }
.product h3 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; line-height: 1.1; }
.product h3 .en { font-size: .5em; color: var(--muted); font-weight: 600; letter-spacing: .18em; margin-left: 14px; vertical-align: middle; }
.product .sub { font-size: 18px; color: var(--teal); margin-top: 10px; font-weight: 500; }
.product .desc { margin-top: 18px; color: var(--text-2); font-size: 16px; }
.product-feats { margin-top: 26px; display: grid; gap: 14px; }
.product-feats li { display: flex; gap: 12px; font-size: 15px; color: var(--text-2); }
.product-feats li::before { content: ""; flex: none; width: 18px; height: 18px; margin-top: 4px; border-radius: 5px;
  background: rgba(29,233,182,.12); position: relative; }
.product-feats li b { color: var(--text); font-weight: 600; }
/* 单张主图横向铺满整屏、置于最底层、文字压其上：
   100vw 全宽、统一透明度、高度由 top/bottom:0 顶满整个 .product（上下分隔线之间） */
.product-media {
  position: absolute; top: 0; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 100vw; z-index: 0; pointer-events: none;
  opacity: .15;
}
.product-stack { position: absolute; inset: 0; }
.product-stack .shot.back { display: none; }          /* 只保留一张主图 */
.product-stack .shot.front { position: absolute; inset: 0; margin: 0; }
.product-stack .shot,
.product-stack .shot.front img {
  width: 100%; height: 100%; border-radius: 0; aspect-ratio: auto; object-fit: cover; display: block;
}
.product-media .badge { display: none; }              /* 弱化背景下不再保留卡片式数字角标 */

/* ============================================================
   案例
   ============================================================ */
.cases-sec { background: var(--bg-1); }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.case {
  background: linear-gradient(160deg, var(--panel), var(--bg-2));
  border: 1px solid var(--line-soft); border-radius: var(--r); padding: 26px 24px;
  transition: border-color .35s, transform .35s var(--ease), background .35s; position: relative; overflow:hidden;
}
.case::before { content:""; position:absolute; top:0; left:0; width:100%; height:2px;
  background: linear-gradient(90deg, var(--teal), transparent); transform: scaleX(0); transform-origin:left; transition: transform .4s var(--ease); }
.case:hover { transform: translateY(-6px); border-color: var(--line); }
.case:hover::before { transform: scaleX(1); }
.case .ind { font-size: 12px; letter-spacing: .14em; color: var(--teal); }
.case h4 { font-size: 20px; margin: 8px 0 10px; }
.case p { font-size: 14px; color: var(--muted); line-height: 1.65; }
.case.feat { grid-column: span 2; grid-row: span 1; display: grid; grid-template-columns: 1fr 1fr; padding: 0; }
.case.feat .ph { background-size: cover; background-position: center; min-height: 240px; }
.case.feat .body { padding: 28px; align-self: center; }
.case.feat h4 { font-size: 24px; }
/* 文字版大卡：无图占位，整卡为文字，左侧青绿竖条强调 */
.case.feat.text-only { display: block; padding: 32px 30px; position: relative;
  background: linear-gradient(160deg, rgba(29,233,182,.07), var(--bg-2)); }
.case.feat.text-only .body { padding: 0; }
.case.feat.text-only h4 { font-size: 28px; }
.case.feat.text-only p { font-size: 15px; max-width: 640px; }

/* ============================================================
   团队
   ============================================================ */
.founder { display: grid; grid-template-columns: 1fr 1.2fr; gap: 56px; align-items: center; margin-bottom: 80px; }
.founder-portrait {
  border-radius: var(--r-lg); border: 1px solid var(--line);
  background: linear-gradient(160deg, var(--panel-2), var(--bg)); aspect-ratio: 4/5;
  display: grid; place-items: center; position: relative; overflow: hidden;
}
.founder-portrait .initial { font-size: 130px; font-weight: 800; color: rgba(29,233,182,.16); letter-spacing: -.04em; }
.founder-portrait .ring { position:absolute; width:280px; height:280px; border:1px solid var(--line); border-radius:50%; }
.founder-portrait .ring:nth-child(2){ width:200px; height:200px; border-color:rgba(29,233,182,.2);}
.founder-info .role { color: var(--teal); font-size: 14px; letter-spacing: .14em; }
.founder-info h3 { font-size: 38px; font-weight: 800; margin: 6px 0 18px; }
.founder-info p { color: var(--text-2); font-size: 16px; }
.founder-track { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; }
.founder-track span { font-size: 13px; color: var(--text-2); border: 1px solid var(--line-soft);
  border-radius: 999px; padding: 6px 14px; background: rgba(255,255,255,.02); }
.founder-track span b { color: var(--teal); font-weight: 600; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.member {
  background: linear-gradient(160deg, var(--panel), var(--bg-1)); border: 1px solid var(--line-soft);
  border-radius: var(--r); padding: 26px 22px; transition: border-color .3s, transform .3s var(--ease);
}
.member:hover { border-color: var(--teal); transform: translateY(-4px); }
.member .av { width: 52px; height: 52px; border-radius: 14px; background: rgba(29,233,182,.1);
  color: var(--teal); display: grid; place-items: center; font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.member h4 { font-size: 19px; }
.member .role { color: var(--teal); font-size: 13px; margin: 4px 0 10px; letter-spacing:.04em; }
.member p { font-size: 13.5px; color: var(--muted); line-height: 1.6; }

/* ============================================================
   团队（整体呈现）
   ============================================================ */
.team-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  border: 1px solid var(--line-soft); border-radius: var(--r);
  background: linear-gradient(160deg, var(--panel-2), var(--bg-2)); overflow: hidden; margin-bottom: 40px;
}
.team-stats .ts-item { padding: 28px 26px; border-right: 1px solid var(--line-soft); }
.team-stats .ts-item:last-child { border-right: 0; }
.team-stats .ts-num { font-size: clamp(17px, 1.7vw, 21px); font-weight: 700; color: var(--white); letter-spacing: -.01em; }
.team-stats .ts-lbl { font-size: 13.5px; color: var(--muted); margin-top: 6px; }

.gene-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.gene {
  background: linear-gradient(160deg, var(--panel), var(--bg-1)); border: 1px solid var(--line-soft);
  border-radius: var(--r); padding: 26px 22px; transition: border-color .3s, transform .3s var(--ease);
}
.gene:hover { border-color: var(--teal); transform: translateY(-4px); }
.gene-ic { width: 46px; height: 46px; border-radius: 12px; background: rgba(29,233,182,.1);
  color: var(--teal); display: grid; place-items: center; font-size: 22px; margin-bottom: 16px; }
.gene h4 { font-size: 18px; margin-bottom: 8px; }
.gene p { font-size: 13.5px; color: var(--muted); line-height: 1.65; }

/* ============================================================
   高光时刻
   ============================================================ */
.highlights-sec { background: var(--bg-1); }
.hl-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; grid-auto-rows: 1fr; }
.hl-card {
  border: 1px solid var(--line-soft); border-radius: var(--r); padding: 30px;
  background: linear-gradient(160deg, var(--panel-2), var(--bg-2)); position: relative; overflow: hidden;
  transition: border-color .3s, transform .3s var(--ease);
}
.hl-card:hover { border-color: var(--line); transform: translateY(-4px); }
.hl-card .yr { font-size: 13px; color: var(--teal); letter-spacing: .14em; font-weight: 600; }
.hl-card h4 { font-size: clamp(20px, 2.4vw, 26px); margin: 10px 0; line-height: 1.25; }
.hl-card p { font-size: 14.5px; color: var(--text-2); }
.hl-card.big { grid-column: span 6; }
.hl-card.med { grid-column: span 6; }
.hl-card.sm { grid-column: span 4; }
.hl-card .big-num { font-size: 52px; font-weight: 800; color: var(--white); line-height: 1; }
.hl-card .big-num em { color: var(--teal); font-style: normal; }
.hl-media { position:absolute; right:-30px; bottom:-30px; width:200px; opacity:.22; border-radius:12px; }

/* ============================================================
   信任墙
   ============================================================ */
.trust-row { display: grid; grid-template-columns: 160px 1fr; gap: 30px; align-items: center;
  padding: 30px 0;  }
.trust-label { font-size: 15px; color: var(--text); font-weight: 600; }
.trust-label span { display:block; font-size: 12px; color: var(--muted); letter-spacing:.14em; margin-top:4px; font-weight:400;}
.chips { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  font-size: 14.5px; color: var(--text-2); border: 1px solid var(--line-soft);
  border-radius: 10px; padding: 10px 18px; background: rgba(255,255,255,.02);
  transition: border-color .25s, color .25s, background .25s;
}
.chip:hover { border-color: var(--teal); color: var(--white); background: rgba(29,233,182,.05); }

/* ============================================================
   CTA + Footer
   ============================================================ */
.cta {
  margin: 0 auto; max-width: var(--maxw); text-align: center; padding: 90px 24px;
  position: relative;
}
.cta h2 { font-size: clamp(30px, 4.6vw, 52px); font-weight: 800; letter-spacing: -.01em; }
.cta h2 .grad { background: linear-gradient(100deg, var(--teal), var(--white));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.cta p { color: var(--text-2); margin: 18px auto 34px; max-width: 560px; font-size: 17px; }

footer { border-top: 1px solid var(--line-soft); padding: 64px 0 40px; background: var(--bg-1); }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.foot-brand .logo { margin-bottom: 16px; }
.foot-brand p { color: var(--muted); font-size: 14px; max-width: 280px; }
.foot-col h5 { font-size: 13px; letter-spacing: .14em; color: var(--muted); text-transform: uppercase; margin-bottom: 16px; }
.foot-col a, .foot-col p { display: block; color: var(--text-2); font-size: 14.5px; margin-bottom: 10px; transition: color .25s; }
.foot-col a:hover { color: var(--teal); }
.foot-bottom { margin-top: 50px; padding-top: 24px; border-top: 1px solid var(--line-soft);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; color: var(--muted); font-size: 13px; }
.foot-beian { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 8px 22px; font-size: 12.5px; }
.foot-beian a { color: var(--muted); transition: color .25s; }
.foot-beian a:hover { color: var(--text-2); }

/* ============================================================
   滚动揭示动画
   ============================================================ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: .08s; } .reveal.d2 { transition-delay: .16s; }
.reveal.d3 { transition-delay: .24s; } .reveal.d4 { transition-delay: .32s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-orbit span, .hero-orbit::before, .hero-orbit::after { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 英文模式：隐藏未译内容时回退 ---------- */
[data-lang="en"] .zh-only { display: none; }
[data-lang="zh"] .en-only { display: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
  .section { padding: 84px 0; }
  .about-grid, .founder { grid-template-columns: 1fr; }
  /* 移动端：主图作更淡的全幅背景，文字铺满压其上 */
  .product-text { max-width: 100%; }
  .product-media { opacity: .1; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 22px; }
  .cases-grid, .team-grid { grid-template-columns: 1fr 1fr; }
  .gene-grid { grid-template-columns: 1fr 1fr 1fr; }
  .team-stats { grid-template-columns: 1fr 1fr; }
  .team-stats .ts-item:nth-child(2) { border-right: 0; }
  .team-stats .ts-item:nth-child(1), .team-stats .ts-item:nth-child(2) { border-bottom: 1px solid var(--line-soft); }
  .case.feat { grid-column: span 2; }
  .hl-card.big, .hl-card.med, .hl-card.sm { grid-column: span 12; }
  .hl-grid { grid-auto-rows: auto; }            /* 单列时不再强制等高，避免空白过多 */
  .foot-grid { grid-template-columns: 1fr 1fr; }

  .nav-links, .nav-right .btn { display: none; }
  .nav-toggle { display: flex; }
  .nav.open .nav-links {
    display: flex; position: fixed; top: 72px; left: 0; right: 0; flex-direction: column;
    align-items: stretch; gap: 0; background: rgba(5,8,10,.98);
    backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line); padding: 8px 24px 20px;
  }
  .nav.open .nav-links a { padding: 15px 2px; border-bottom: 1px solid var(--line-soft); font-size: 16px; }

  .timeline::before, .timeline-progress { left: 18px; }
  .tl-item { width: 100%; left: 0 !important; text-align: left !important; padding: 16px 0 16px 48px; }
  .tl-item .tl-dot { left: 11px !important; right: auto !important; }
}
@media (max-width: 560px) {
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .cases-grid, .team-grid, .foot-grid, .gene-grid { grid-template-columns: 1fr; }
  .cap-cards { grid-template-columns: 1fr; grid-auto-rows: auto; }  /* 单列复位等高 */
  .team-stats { grid-template-columns: 1fr; }
  .team-stats .ts-item { border-right: 0; border-bottom: 1px solid var(--line-soft); }
  .team-stats .ts-item:last-child { border-bottom: 0; }
  /* 单列时 feat 卡不再 span 2，否则会撑出隐式第二列、把后续卡片挤成窄列 */
  .case.feat { grid-column: auto; grid-template-columns: 1fr; }
  .trust-row { grid-template-columns: 1fr; gap: 14px; }
}