@charset "UTF-8";
/* ==========================================================================
   天之晓 · AI 数据标注服务（单页）
   主旨：让数据成为 AI 决策的起点
   配色：白底 + 橙色强调，LOGO 黄仅保留在标志本身
   ========================================================================== */

/* ---------- 1. tokens ---------- */
:root {
  --bg: #ffffff;
  --bg-soft: #faf8f5;      /* 交替浅暖灰 */
  --bg-band: #f7f2ec;      /* 主张带 */
  --surface: #ffffff;
  --sand: #f4f1ec;
  --sand-2: #e2dcd5;
  --sand-3: #cfc7be;

  /* 图片卡纸：统一为极浅暖灰，仅作底衬 */
  --mat-med: #f4f1ec;   --mat-med-2: #e6e0d8;
  --mat-arg: #f2f3ec;   --mat-arg-2: #e3e5d9;
  --mat-wea: #f1f3f5;   --mat-wea-2: #e0e4e8;
  --mat-edu: #f6f2eb;   --mat-edu-2: #e8e1d5;

  --ink: #16110e;
  --ink-2: #241c17;
  --muted: #55483f;
  --muted-2: #87796e;

  /* 强调色：橙 */
  --accent: #f28a4b;
  --accent-deep: #ad5620;
  --accent-soft: #fce5d4;
  --accent-tint: #fff8f3;
  --accent-glow: rgba(242, 138, 75, 0.3);
  --accent-solid: #d97f3d;  /* 实心按钮：保证白字对比度 */

  --logo-yellow: #fcc824;   /* LOGO 黄，不参与界面配色 */

  --text: var(--ink);
  --line: rgba(22, 17, 14, 0.28);
  --line-soft: rgba(22, 17, 14, 0.15);
  --line-hair: rgba(22, 17, 14, 0.08);

  --shadow-sm: 0 1px 2px rgba(48, 28, 12, 0.05), 0 16px 30px -26px rgba(48, 28, 12, 0.45);
  --shadow-md: 0 2px 10px rgba(48, 28, 12, 0.08), 0 34px 60px -42px rgba(48, 28, 12, 0.5);

  --wrap: 1280px;
  --r: 12px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --font-sans: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-serif: "Songti SC", "STSong", "SimSun", "Source Han Serif SC", serif;
}

/* ---------- 2. base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.015em; line-height: 1.22; }
p { margin: 0; }
::selection { background: rgba(242, 138, 75, 0.45); }
:focus-visible { outline: 2px solid var(--accent-deep); outline-offset: 3px; }
[id] { scroll-margin-top: 94px; }

/* ---------- 3. layout ---------- */
.wrap { width: min(var(--wrap), 92vw); margin-inline: auto; }
.section { padding: 82px 0; position: relative; }
.section--white { background: var(--bg-soft); }
.section--alt { background: var(--bg-soft); }
.section--tight { padding: 62px 0; }

.sec-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 20px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line-soft);
}
.sec-head__aside {
  flex: none;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
  line-height: 1.9;
}

/* ---------- 4. type ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  margin-bottom: 14px;
  font-weight: 500;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

.display { font-size: clamp(21px, 4.5vw, 62px); letter-spacing: -0.035em; line-height: 1.14; }
.h2 { font-size: clamp(26px, 2.4vw, 38px); letter-spacing: -0.028em; }
.lead { font-size: 16.5px; line-height: 1.8; color: var(--muted); }
.lead--wide { max-width: 100%; }
.body { color: var(--muted); font-size: 15px; }
.mono { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; }
.mark-y { color: var(--accent); }

/* ---------- 5. buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 50px;
  padding: 0 26px;
  border: 1px solid var(--accent-solid);
  border-radius: 8px;
  background: var(--accent-solid);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), border-color 0.35s var(--ease), color 0.35s var(--ease);
}
.btn:hover { background: #c26a2a; border-color: #c26a2a; color: #fff; transform: translateY(-2px); box-shadow: 0 10px 24px -12px var(--accent-glow); }
.btn__arrow { transition: transform 0.35s var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }
.btn--ghost { background: transparent; color: var(--ink); border-color: rgba(22, 17, 14, 0.22); }
.btn--ghost:hover { background: var(--accent-solid); border-color: var(--accent-solid); color: #fff; }
.btn--sm { height: 42px; padding: 0 19px; font-size: 14px; border-radius: 6px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; }

/* ---------- 6. chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border: 1px solid rgba(22, 17, 14, 0.14);
  background: var(--surface);
  color: var(--ink);
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.03em;
}
.chip--plain { border-color: var(--line-soft); background: transparent; color: var(--muted); }
.chip--y { background: var(--accent-tint); border-color: rgba(242, 138, 75, 0.5); color: var(--accent-deep); }

/* ---------- 7. header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  height: 74px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.site-header.is-solid { border-bottom-color: var(--line-soft); background: rgba(255, 255, 255, 0.94); }
.site-header__inner { width: min(var(--wrap), 92vw); margin-inline: auto; display: flex; align-items: center; gap: 30px; }

.brand { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.brand__mark { width: 36px; height: 36px; flex: none; }
.brand__word { height: 20px; width: auto; }

.nav { display: flex; align-items: center; gap: 0; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 7px 12px;
  margin: 0 2px;
  border-radius: 7px;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav__link:hover { color: var(--accent-deep); background: var(--accent-tint); }
.nav__link.is-active { color: var(--accent-deep); background: var(--accent-tint); font-weight: 500; }

.header-cta { flex: none; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-soft);
  background: var(--surface);
  border-radius: 8px;
  position: relative;
}
.nav-toggle span { position: absolute; left: 12px; right: 12px; height: 1.5px; background: var(--ink); transition: transform 0.35s var(--ease); }
.nav-toggle span:nth-child(1) { top: 16px; }
.nav-toggle span:nth-child(2) { bottom: 16px; }
body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { transform: translateY(-5.5px) rotate(-45deg); }

/* ---------- 8. hero ---------- */
.hero { padding: 132px 0 0; position: relative; overflow: hidden; background: var(--bg); }
.hero__glow {
  position: absolute;
  width: 1200px;
  height: 700px;
  left: 50%;
  transform: translateX(-50%);
  top: -340px;
  background: radial-gradient(56% 56% at 50% 50%, rgba(242, 138, 75, 0.13), rgba(242, 138, 75, 0.0) 76%);
  pointer-events: none;
}
/* 数据网格 + 网络节点 */
.hero__grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(242, 138, 75, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(242, 138, 75, 0.05) 1px, transparent 1px);
  background-size: 84px 84px;
  -webkit-mask-image: radial-gradient(72% 62% at 50% 32%, #000 8%, transparent 76%);
  mask-image: radial-gradient(72% 62% at 50% 32%, #000 8%, transparent 76%);
}
.hero__dots {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(242, 138, 75, 0.18) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-mask-image: radial-gradient(72% 62% at 50% 34%, #000 6%, transparent 74%);
  mask-image: radial-gradient(72% 62% at 50% 34%, #000 6%, transparent 74%);
  opacity: 0.85;
}
.hero__net {
  position: absolute;
  inset: 0 0 auto;
  width: 100%;
  height: 700px;
  pointer-events: none;
  opacity: 0.95;
}
.hero__net .n-line { stroke: rgba(22, 17, 14, 0.2); stroke-width: 1; fill: none; }
.hero__net .n-line--flow { stroke: rgba(242, 138, 75, 0.85); stroke-width: 1.4; fill: none; stroke-dasharray: 5 9; animation: flow 12s linear infinite; }
.hero__net .n-line--soft { stroke: rgba(22, 17, 14, 0.1); stroke-width: 1; fill: none; stroke-dasharray: 2 6; }
@keyframes flow { to { stroke-dashoffset: -240; } }
.hero__net .n-ring { fill: none; stroke: rgba(242, 138, 75, 0.75); stroke-width: 1.2; }
.hero__net .n-ring--big { fill: none; stroke: rgba(22, 17, 14, 0.12); stroke-width: 1; }
.hero__net .n-ring--dash {
  fill: none;
  stroke: rgba(242, 138, 75, 0.5);
  stroke-width: 1;
  stroke-dasharray: 2 7;
  transform-box: fill-box;
  transform-origin: 50% 50%;
  animation: spinRing 38s linear infinite;
}
.hero__net .net { pointer-events: none; }
.hero__net .net--left .n-edge--hot { animation-delay: -2s; }
.hero__net .net--right .n-edge--hot { animation-delay: -5s; }
.hero__net .n-line { stroke: rgba(22, 17, 14, 0.2); stroke-width: 1; fill: none; }
.hero__net .n-line--flow { stroke: rgba(242, 138, 75, 0.8); stroke-width: 1.3; fill: none; stroke-dasharray: 5 9; animation: flow 12s linear infinite; }
.hero__net .n-line--soft { stroke: rgba(22, 17, 14, 0.13); stroke-width: 1; fill: none; stroke-dasharray: 2 6; }
@keyframes flow { to { stroke-dashoffset: -240; } }
.hero__net .n-edge { stroke: rgba(22, 17, 14, 0.055); stroke-width: 1; fill: none; }
.hero__net .n-edge--hot { stroke: rgba(242, 138, 75, 0.5); stroke-width: 1.2; fill: none; stroke-dasharray: 4 8; animation: flow 9s linear infinite; }
.hero__net .n-node { fill: var(--surface); stroke: rgba(22, 17, 14, 0.3); stroke-width: 1.1; }
.hero__net .n-node--hot { fill: var(--accent); stroke: rgba(173, 86, 32, 0.55); }
.hero__net .n-ring { fill: none; stroke: rgba(242, 138, 75, 0.6); stroke-width: 1; }
.hero__net .n-ring--dash {
  fill: none;
  stroke: rgba(242, 138, 75, 0.55);
  stroke-width: 1;
  stroke-dasharray: 2 6;
  transform-box: fill-box;
  transform-origin: 50% 50%;
  animation: spinRing 30s linear infinite;
}
.hero__net .kg-edge { fill: none; stroke: rgba(22, 17, 14, 0.24); stroke-width: 1.1; }
.hero__net .kg-edge--hot {
  fill: none;
  stroke: rgba(242, 138, 75, 0.75);
  stroke-width: 1.3;
  stroke-dasharray: 5 7;
  animation: flow 10s linear infinite;
}
.hero__net .kg-node { fill: var(--surface); stroke: rgba(22, 17, 14, 0.34); stroke-width: 1.2; }
.hero__net .kg-node--hub { fill: var(--accent); stroke: rgba(173, 86, 32, 0.55); stroke-width: 1.2; }
@keyframes spinRing { to { transform: rotate(360deg); } }
.hero__net text { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; fill: var(--muted-2); }
.hero__net text.y { fill: var(--accent-deep); font-weight: 500; }

.hero__copy { position: relative; text-align: center; max-width: 1040px; margin-inline: auto; }
.hero__title { margin-bottom: 22px; white-space: nowrap; }
.hero__title em { font-style: normal; }
.hero__lead { max-width: 640px; margin-inline: auto; }
.hero__chips { justify-content: center; margin-top: 24px; }
.hero__actions { justify-content: center; margin-top: 30px; }

/* 数据链路 */
.pipeline {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 46px;
  padding: 16px 24px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--line-hair);
  border-radius: 40px;
  width: fit-content;
  margin-inline: auto;
  backdrop-filter: blur(6px);
}
.pipeline__node { display: inline-flex; align-items: center; gap: 9px; padding: 0 6px; }
.pipeline__node i {
  width: 9px; height: 9px; border-radius: 50%;
  border: 1.5px solid rgba(22, 17, 14, 0.35);
  background: var(--surface);
  flex: none;
}
.pipeline__node b { font-weight: 500; font-size: 14px; color: var(--ink); }
.pipeline__node em { font-style: normal; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; color: var(--muted-2); }
.pipeline__node--ai i { background: var(--accent); border-color: var(--accent-deep); box-shadow: 0 0 0 4px rgba(242, 138, 75, 0.26); }
.pipeline__link {
  position: relative;
  width: 74px;
  height: 1px;
  background: rgba(22, 17, 14, 0.18);
  overflow: hidden;
}
.pipeline__link::after {
  content: "";
  position: absolute;
  inset: 0;
  width: 34px;
  background: linear-gradient(90deg, transparent, var(--accent-deep), transparent);
  animation: pipe 2.6s linear infinite;
}
@keyframes pipe { from { transform: translateX(-40px); } to { transform: translateX(80px); } }

.band {
  position: relative;
  width: min(var(--wrap), 92vw);
  margin: 48px auto 0;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 34px 64px -48px rgba(48, 28, 12, 0.65);
}
.band__meta {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg);
}
.band__meta-inner { display: flex; flex-wrap: wrap; align-items: center; }
.band__meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px 12px 0;
  margin-right: 22px;
  border-right: 1px solid var(--line-hair);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--muted);
}
.band__meta-item:last-child { border-right: 0; margin-right: 0; }
.band__meta-item b { font-family: var(--font-mono); font-size: 11.5px; color: var(--accent-deep); letter-spacing: 0.04em; }
.band__meta-live { display: inline-flex; align-items: center; gap: 7px; margin-left: auto; padding-left: 8px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.12em; color: var(--muted-2); }
.band__meta-live i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px rgba(242, 138, 75, 0.16); animation: blink 1.8s ease-in-out infinite; }
.band__frame {
  position: relative;
  overflow: hidden;
  background: var(--sand);
  aspect-ratio: 2.5 / 1;
  max-height: 560px;
}
.band__frame > img { width: 100%; height: 100%; object-fit: cover; animation: kenburns 30s ease-in-out infinite alternate; }
@keyframes kenburns { from { transform: scale(1); } to { transform: scale(1.05); } }
.band__scan {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 34%;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(242, 138, 75, 0.0) 0%, rgba(242, 138, 75, 0.12) 62%, rgba(255, 176, 128, 0.45) 99%, rgba(242, 138, 75, 0.0) 100%);
  animation: scanY 6.8s cubic-bezier(0.42, 0, 0.58, 1) infinite;
}
@keyframes scanY { 0% { transform: translateY(-130%); } 100% { transform: translateY(320%); } }
.band__hud { position: absolute; inset: 0; z-index: 3; pointer-events: none; }
.hud-chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(242, 138, 75, 0.4);
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.04em;
  color: var(--accent-deep);
  white-space: nowrap;
  box-shadow: 0 6px 16px -10px rgba(48, 28, 12, 0.6);
  animation: floatY 7s ease-in-out infinite;
}
.hud-chip i { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); flex: none; animation: blink 2.4s ease-in-out infinite; }
.hud-chip:nth-child(2) { animation-delay: 0.9s; }
.hud-chip:nth-child(3) { animation-delay: 1.8s; }
.hud-chip:nth-child(4) { animation-delay: 2.7s; }
@keyframes floatY { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-7px); } }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.25; } }
.band__grid { position: absolute; inset: 0; z-index: 4; display: grid; grid-template-columns: repeat(4, 1fr); pointer-events: none; }
.band__cell::before,
.band__cell::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  opacity: 0.75;
  animation: bracket 4.2s ease-in-out infinite;
}
.band__cell::before { left: 14px; top: 14px; border-left: 2px solid var(--accent); border-top: 2px solid var(--accent); }
.band__cell::after { right: 14px; bottom: 14px; border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent); animation-delay: 0.7s; }
.band__cell:nth-child(2)::before, .band__cell:nth-child(2)::after { animation-delay: 0.35s; }
.band__cell:nth-child(3)::before, .band__cell:nth-child(3)::after { animation-delay: 0.7s; }
.band__cell:nth-child(4)::before, .band__cell:nth-child(4)::after { animation-delay: 1.05s; }
@keyframes bracket { 0%, 100% { opacity: 0.35; } 50% { opacity: 0.95; } }
.band__cell { position: relative; border-right: 1px solid rgba(22, 17, 14, 0.1); }
.band__cell:last-child { border-right: 0; }
.band__tag {
  position: absolute;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(242, 138, 75, 0.45);
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  color: var(--muted);
}
.band__tag b { font-weight: 600; color: var(--ink); font-family: var(--font-sans); font-size: 13px; }
.band__tag i { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; flex: none; }

/* ---------- 9. 图片卡纸（影像衬底） ---------- */
.mat {
  background: #ffffff;
  border: 1px solid var(--line-hair);
  border-radius: 10px;
  padding: 0;
  overflow: hidden;
  box-shadow: 0 14px 30px -26px rgba(48, 28, 12, 0.5);
}
.mat--med, .mat--arg, .mat--wea, .mat--edu { background: #ffffff; }
.mat__inner {
  position: relative;
  overflow: hidden;
  border-radius: 0;
  background: #f7f5f2;
}
.mat__inner img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease); }
.mat__inner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.55) 48%, transparent 62%);
  transform: translateX(-120%);
  transition: transform 0.9s var(--ease);
  pointer-events: none;
}
.ind:hover .mat__inner::after, .mod:hover .mat__inner::after { transform: translateX(120%); }

/* ---------- 10. 行业 ---------- */
.industries { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.ind {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-hair);
  border-radius: var(--r);
  padding: 0;
  display: flex;
  flex-direction: column;
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
  box-shadow: var(--shadow-sm);
}
.ind::after, .mod::after, .partner::after { content: ""; position: absolute; left: 0; top: 0; height: 2px; width: 0; background: var(--accent); transition: width 0.55s var(--ease); }
.ind:hover::after, .mod:hover::after, .partner:hover::after { width: 100%; }
.ind:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.ind:hover .mat__inner img { transform: scale(1.03); }
.ind .mat { border: 0; border-bottom: 1px solid var(--line-hair); border-radius: 0; box-shadow: none; }
.ind .mat__inner { aspect-ratio: 4 / 5; }
.ind__body { padding: 16px 16px 16px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.ind__name { font-size: 19px; font-weight: 600; }
.ind__en { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; color: var(--muted-2); }
.ind__desc { font-size: 13.5px; color: var(--muted); line-height: 1.72; }
.ind__std {
  margin-top: auto;
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 9px 10px;
  background: var(--bg-soft);
  border-left: 2px solid var(--accent);
  border-radius: 0 4px 4px 0;
  font-size: 12.5px;
  color: var(--ink-2);
  line-height: 1.6;
}
.ind__std b { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.1em; color: var(--accent-deep); font-weight: 500; flex: none; }
.ind__keys { margin-top: auto; padding-top: 12px; border-top: 1px solid var(--line-hair); }
.ind__keys .chip { font-size: 11px; padding: 3px 9px; background: var(--bg-soft); border-color: transparent; color: var(--muted); }

/* ---------- 10b. 标注能力 ---------- */
.caps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; margin-top: 22px; }
.cap {
  position: relative;
  padding: 16px 18px 17px;
  background: var(--bg-soft);
  border: 1px solid var(--line-hair);
  border-radius: 10px;
  transition: border-color 0.4s var(--ease), box-shadow 0.4s var(--ease), transform 0.4s var(--ease);
}
.cap:hover { transform: translateY(-2px); border-color: rgba(242, 138, 75, 0.45); box-shadow: var(--shadow-sm); }
.cap__code { display: block; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.16em; color: var(--accent-deep); margin-bottom: 9px; }
.cap__title { font-size: 15.5px; font-weight: 600; margin-bottom: 5px; }
.cap__desc { font-size: 12.8px; color: var(--muted); line-height: 1.65; }

/* ---------- 11. 四类模态 ---------- */
.mods { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.mod { position: relative; overflow: hidden; background: var(--surface); border: 1px solid var(--line-hair); border-radius: var(--r); padding: 0; box-shadow: var(--shadow-sm); transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease); }
.mod:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.mod:hover .mat__inner img { transform: scale(1.04); }
.mod .mat { border: 0; border-bottom: 1px solid var(--line-hair); border-radius: 0; box-shadow: none; }
.mod .mat__inner { aspect-ratio: 1 / 1; }
.mod__tags { position: absolute; left: 12px; top: 12px; display: flex; flex-direction: column; align-items: flex-start; gap: 5px; z-index: 2; }
.mod__tag {
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(242, 138, 75, 0.5);
  border-radius: 3px;
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
}
.mod__body { padding: 14px 16px 16px; }
.mod__head { display: flex; align-items: baseline; gap: 8px; }
.mod__name { font-size: 17.5px; font-weight: 600; }
.mod__en { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; color: var(--muted-2); }
.mod__desc { margin-top: 7px; font-size: 13.5px; color: var(--muted); line-height: 1.7; }

/* ---------- 12. 流程图 ---------- */
.flowchart {
  background: var(--surface);
  border: 1px solid var(--line-hair);
  border-radius: var(--r);
  padding: 26px 22px 18px;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
.flowchart svg { display: block; width: 100%; min-width: 940px; height: auto; }
.fc-lane { fill: none; }
.fc-role { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em; fill: var(--muted-2); }
.fc-box { fill: var(--surface); stroke: var(--sand-2); stroke-width: 1.4; }
.fc-box--ai { fill: var(--accent-soft); stroke: rgba(242, 138, 75, 0.6); }
.fc-box--qc { fill: #f8f5f1; stroke: var(--sand-3); }
.fc-box--fix { fill: #faf8f5; stroke: #d8cdc4; stroke-dasharray: 5 4; }
.fc-title { font-size: 15px; font-weight: 600; fill: var(--ink); }
.fc-sub { font-size: 11px; fill: var(--muted); }
.fc-arrow { stroke: #9fb0c8; stroke-width: 1.4; fill: none; }
.fc-arrow--loop { stroke: #f28a4b; stroke-width: 1.4; fill: none; stroke-dasharray: 6 5; }
.fc-label { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; fill: var(--muted-2); }
.fc-label--y { fill: var(--accent-deep); }
.fc-badge { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.1em; fill: var(--muted-2); }
.fc-note { font-size: 11.5px; fill: var(--muted-2); }

.guards { margin-top: 26px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-top: 1px solid var(--line-soft); }
.guard { padding: 20px 18px 0 0; border-right: 1px solid var(--line-hair); }
.guard:last-child { border-right: 0; padding-right: 0; }
.guard__no { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.1em; color: var(--accent-deep); display: block; margin-bottom: 8px; }
.guard__title { font-size: 15.5px; font-weight: 600; margin-bottom: 5px; }
.guard__desc { font-size: 13px; color: var(--muted); line-height: 1.65; }

/* ---------- 12b. 主张带 ---------- */
.statement { position: relative; overflow: hidden; background: var(--bg-band); border-block: 1px solid var(--line-soft); padding: 60px 0; }
.statement::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(242, 138, 75, 0.13) 1px, transparent 1px);
  background-size: 22px 22px;
  -webkit-mask-image: linear-gradient(100deg, #000 0%, transparent 62%);
  mask-image: linear-gradient(100deg, #000 0%, transparent 62%);
  opacity: 0.55;
}
.statement .wrap { position: relative; z-index: 1; }
.statement__net {
  position: absolute;
  right: 0;
  top: 4px;
  width: 340px;
  height: 170px;
  pointer-events: none;
}
.sn-line { stroke: rgba(242, 138, 75, 0.3); stroke-width: 1.2; fill: none; }
.sn-line--flow { stroke: rgba(242, 138, 75, 0.65); stroke-width: 1.4; fill: none; stroke-dasharray: 4 8; animation: flow 10s linear infinite; }
.sn-dot { fill: #fff; stroke: rgba(242, 138, 75, 0.6); stroke-width: 1.4; }
.sn-dot--fill { fill: var(--accent); stroke: #fff; stroke-width: 1.5; }
.sn-label { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; fill: var(--accent-deep); }
@media (max-width: 1180px) { .statement__net { display: none; } }
.statement__line {
  font-size: clamp(21px, 2.5vw, 37px);
  line-height: 1.42;
  letter-spacing: -0.022em;
  max-width: 24em;
  margin-top: 14px;
  font-weight: 600;
}
.statement__line em { font-style: normal; color: var(--accent); }
.why { margin-top: 34px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--line); }
.why__item { padding: 18px 26px 0 0; border-right: 1px solid var(--line-hair); }
.why__item:last-child { border-right: 0; }
.why__item h3 em {
  font-style: normal;
  font-weight: 500;
  font-size: 0.8em;
  color: var(--accent-deep);
  letter-spacing: 0.01em;
}
.why__item h3 { font-size: 16.5px; font-weight: 600; margin-bottom: 7px; }
.why__item p { font-size: 13.5px; color: var(--muted); line-height: 1.72; }
.why__item span { display: block; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.12em; color: var(--accent-deep); margin-bottom: 10px; }

.formats {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 12px 16px;
  border: 1px solid var(--line-hair);
  border-radius: 8px;
  background: var(--accent-tint);
}
.formats__k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em; color: var(--accent-deep); }
.formats__v { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.03em; color: var(--muted); }
.formats__sep { width: 1px; height: 14px; background: var(--line-soft); margin: 0 6px; }
.formats .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent); }

/* ---------- 13. 资质 ---------- */
.certs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.cert {
  background: var(--surface);
  border: 1px solid var(--line-hair);
  border-radius: var(--r);
  padding: 28px 14px;
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr) max-content minmax(0, 3fr);
  column-gap: 0;
  align-items: center;
  box-shadow: var(--shadow-sm);
}
.cert { transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.45s var(--ease); }
.cert:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); border-color: rgba(22, 17, 14, 0.18); }
.cert__slot {
  grid-column: 1;
  margin-right: 7px;
  aspect-ratio: 1843 / 1280;
  border: 1px solid var(--line-hair);
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}
.cert__slot img { display: block; width: 100%; height: 100%; object-fit: contain; }
.cert__body { grid-column: 3; justify-self: start; }
.cert__key { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.14em; color: var(--accent-deep); display: block; margin-bottom: 15px; }
.cert__name { font-size: 21px; font-weight: 600; line-height: 1.4; }
.cert__owner { font-size: 14px; color: var(--muted); margin-top: 15px; }
.partner-note { margin-top: 20px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted-2); }

/* ---------- 14. 合作伙伴 ---------- */
.partners { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; }
.partner {
  position: relative;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line-hair);
  border-radius: var(--r);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 15px;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.45s var(--ease);
}
.partner:hover { transform: translateY(-3px); box-shadow: var(--shadow-sm); border-color: rgba(242, 138, 75, 0.5); }
.partner__logo {
  width: 68px;
  height: 68px;
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
}
.partner__logo img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.partner__info { min-width: 0; }
.partner__cn { display: block; font-size: 16.5px; font-weight: 600; color: var(--ink); letter-spacing: 0.01em; }
.partner__en { display: block; margin-top: 4px; font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.08em; color: var(--muted-2); line-height: 1.5; }

/* ---------- 15. footer（深色，紧凑） ---------- */
.site-footer { background: #191310; color: #e2dad3; padding: 42px 0 14px; }
.footer-brand { display: grid; align-content: start; }
.site-footer .brand { margin-bottom: 14px; }
.site-footer .brand__mark { width: 38px; height: 38px; }
.site-footer .brand__word { height: 21px; filter: brightness(0) invert(1); opacity: 0.95; }

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.5fr) auto;
  gap: 44px;
  align-items: start;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}
.footer-tagline {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.5;
  color: #ffffff;
  letter-spacing: -0.01em;
  font-weight: 500;
}
.footer-tagline::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }

.footer-meta { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 32px; }
.footer-item { display: grid; gap: 5px; align-content: start; }
.footer-item__k { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.16em; color: #a2938a; }
.footer-item__v { font-size: 14.5px; color: #ffffff; line-height: 1.55; }
.footer-item a.footer-item__v { width: fit-content; color: #ffb27d; transition: color 0.3s var(--ease); }
.footer-item a.footer-item__v:hover { color: #ffffff; }

.footer-cta { display: grid; gap: 11px; justify-items: end; }
.btn--accent { background: var(--accent-solid); border-color: var(--accent-solid); color: #ffffff; }
.btn--accent:hover { background: #ffffff; border-color: #ffffff; color: #191310; }
.footer-top-link { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.12em; color: #ab9f96; transition: color 0.3s var(--ease); }
.footer-top-link:hover { color: #ffffff; }

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  padding-top: 14px;
  font-size: 12.5px;
  color: #ab9f96;
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 0 18px; }
.footer-nav a { font-size: 12.5px; color: #d9cfc7; transition: color 0.3s var(--ease); }
.footer-nav a:hover { color: #ffffff; }

@media (max-width: 1024px) {
  .footer-top { grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 28px; }
  .footer-cta { grid-column: 1 / -1; justify-items: start; }
}
@media (max-width: 860px) {
  .footer-top { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .footer-meta { grid-template-columns: minmax(0, 1fr); gap: 14px; }
}

/* ---------- 16. reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); transition-delay: var(--d, 0s); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 17. responsive ---------- */
@media (min-width: 1600px) {
  :root { --wrap: 1360px; }
  .section { padding: 96px 0; }
  .display { font-size: clamp(21px, 3.4vw, 68px); }
  .band__frame { max-height: 600px; }
  .h2 { font-size: clamp(26px, 1.9vw, 40px); }
}
@media (min-width: 2100px) {
  :root { --wrap: 1440px; }
}
@media (max-width: 1180px) {
  .industries, .mods { gap: 16px; }
  .cert { grid-template-columns: 255px minmax(0, 1fr) max-content minmax(0, 3fr); }
  .guards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guard:nth-child(2n) { border-right: 0; }
  .guard:nth-child(n + 3) { padding-top: 18px; }
}
@media (max-width: 1024px) {
  .section { padding: 72px 0; }
  .hero { padding-top: 116px; }
  .hero__net, .hero__dots { display: none; }
  .band__frame { aspect-ratio: 2.05 / 1; }
  .industries { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .mods { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .caps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .guard { border-right: 0; padding-right: 0; }
  .certs { grid-template-columns: minmax(0, 1fr); }
  .partners { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .nav, .header-cta { display: none; }
  .nav-toggle { display: block; }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: absolute;
    left: 0;
    right: 0;
    top: 74px;
    padding: 8px 4vw 20px;
    background: var(--surface);
    border-bottom: 1px solid var(--line-soft);
  }
  .nav.is-open .nav__link { padding: 14px 10px; margin: 0; border-radius: 8px; font-size: 17px; color: var(--ink); border-bottom: 1px solid var(--line-hair); }
  .nav.is-open .nav__link.is-active { color: var(--accent-deep); }
  .display { font-size: clamp(20px, 6.2vw, 32px); }
  .band__frame { aspect-ratio: 1.35 / 1; }
  .band__grid, .band__hud { display: none; }
  .pipeline { flex-wrap: wrap; gap: 6px; border-radius: 22px; padding: 14px 16px; }
  .pipeline__link { width: 28px; }
  .industries, .partners, .guards, .certs, .caps { grid-template-columns: minmax(0, 1fr); }
  .cert { grid-template-columns: minmax(0, 1fr); }
  .cert__slot,
  .cert__body { grid-column: auto; }
  .cert__slot { margin-right: 0; }
  .cert__body { justify-self: start; }
  .why { grid-template-columns: minmax(0, 1fr); }
  .why__item { border-right: 0; padding-right: 0; }
  .mods { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ind .mat__inner { aspect-ratio: 16 / 11; }
  .sec-head { flex-direction: column; align-items: flex-start; gap: 14px; }
  .sec-head__aside { text-align: left; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}