:root {
  --bg: #eef5f7;
  --ink: #082c3e;
  --muted: #607789;
  --line: #d7e4e9;
  --accent: #12cfbf;
  --accent-dark: #008f84;
  --dark: #062b3c;
  --white: #ffffff;
  --porcelain: #f7fbfb;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.ceramic-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  min-height: 68px;
  align-items: center;
  gap: 30px;
  padding: 10px max(24px, calc((100% - 1240px) / 2));
  border-bottom: 1px solid rgba(215,228,233,.86);
  background: rgba(255,255,255,.9);
  backdrop-filter: blur(16px);
}
.ceramic-brand { display: flex; align-items: center; gap: 11px; margin-right: auto; }
.brand-mark { display: grid; width: 36px; height: 36px; place-items: center; border-radius: 10px; background: var(--accent); color: var(--dark); font-weight: 900; }
.ceramic-brand > span:last-child { display: grid; gap: 2px; }
.ceramic-brand strong { font-size: 16px; }
.ceramic-brand small { color: var(--muted); font-size: 11px; }
.ceramic-header nav { display: flex; gap: 25px; color: var(--muted); font-size: 14px; }
.ceramic-header nav a:hover { color: var(--accent-dark); }
.header-action { display: inline-flex; min-height: 40px; align-items: center; border: 1px solid var(--line); border-radius: 9px; padding: 0 15px; background: #fff; font-size: 14px; font-weight: 700; }

.ceramic-hero {
  display: grid;
  width: min(1240px, calc(100% - 48px));
  min-height: 570px;
  grid-template-columns: minmax(0, 1.02fr) minmax(440px, .98fr);
  align-items: center;
  gap: 46px;
  margin: 24px auto 0;
  overflow: hidden;
  border-radius: 26px;
  padding: 48px 54px;
  background: radial-gradient(circle at 82% 42%, rgba(18,207,191,.2), transparent 30rem), linear-gradient(135deg, #072b3c, #0b3d50);
  color: #f6fcfd;
  box-shadow: 0 26px 70px rgba(13,55,70,.14);
}
.eyebrow { margin: 0 0 10px; color: var(--accent-dark); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.ceramic-hero .eyebrow { color: #44e7d8; }
.hero-copy h1 { margin: 0 0 18px; font-size: clamp(50px, 4.8vw, 66px); line-height: 1.06; letter-spacing: -.045em; }
.hero-lead { max-width: 600px; margin: 0; color: #bed2da; font-size: 17px; line-height: 1.75; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.hero-tags span { border: 1px solid rgba(68,231,216,.3); border-radius: 99px; padding: 7px 11px; background: rgba(4,39,51,.45); color: #c9f5f1; font-size: 12px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 22px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; border-radius: 10px; padding: 0 20px; font-size: 14px; font-weight: 800; }
.button.primary { background: var(--accent); color: var(--dark); }
.button.secondary { border: 1px solid rgba(255,255,255,.28); color: #fff; }
.button.model { border: 1px solid rgba(68,231,216,.5); background: rgba(68,231,216,.1); color: #d9fffb; }
.button.model:hover { background: rgba(68,231,216,.18); }
.hero-metrics { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin-top: 28px; border-top: 1px solid rgba(255,255,255,.14); padding-top: 18px; }
.hero-metrics span { display: grid; gap: 3px; padding: 0 12px; border-left: 1px solid rgba(255,255,255,.14); }
.hero-metrics span:first-child { padding-left: 0; border-left: 0; }
.hero-metrics strong { font-size: 19px; }
.hero-metrics small { color: #8facb7; font-size: 11px; }
.hero-visual { position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.12); border-radius: 22px; background: rgba(2,27,39,.45); }
.hero-visual img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.visual-note { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 16px; background: rgba(5,37,50,.92); }
.visual-note span { color: #84a7b4; font-size: 11px; }
.visual-note strong { font-size: 13px; }

.section { width: min(1240px, calc(100% - 48px)); margin: 0 auto; padding: 80px 0; }
.section-head { max-width: 780px; margin-bottom: 28px; }
.section-head h2, .source-card h2 { margin: 0 0 12px; font-size: clamp(32px, 3vw, 42px); line-height: 1.2; letter-spacing: -.035em; }
.section-head > p:last-child, .source-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.overview-grid { display: grid; grid-template-columns: 1.12fr .88fr; gap: 16px; }
.overview-main, .overview-points article, .service-card, .scenario-grid article, .source-card { border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.overview-main { min-height: 300px; padding: 34px; background: linear-gradient(145deg, #fff, #f3fbfa); }
.card-number { color: var(--accent-dark); font-size: 12px; font-weight: 800; }
.overview-main h3 { margin: 48px 0 12px; font-size: 28px; }
.overview-main p, .overview-points p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.overview-points { display: grid; gap: 12px; }
.overview-points article { display: grid; grid-template-columns: 115px 1fr; align-items: center; padding: 22px; }
.overview-points strong { font-size: 17px; }

.services { padding-top: 20px; }
.service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 15px; }
.service-card { display: flex; min-height: 330px; flex-direction: column; padding: 24px; }
.service-card > span { color: var(--accent-dark); font-size: 12px; font-weight: 800; }
.service-card h3 { margin: 34px 0 10px; font-size: 21px; }
.service-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }
.service-card strong { display: flex; min-height: 44px; align-items: center; justify-content: space-between; margin-top: auto; border: 1px solid var(--line); border-radius: 10px; padding: 0 13px; background: #f6fafb; color: var(--accent-dark); font-size: 14px; }
.service-card strong b { color: var(--accent); font-size: 19px; }
.service-card:hover { border-color: #a6ddd8; box-shadow: 0 14px 34px rgba(17,73,88,.08); transform: translateY(-2px); }

.chain { width: 100%; padding: 80px max(24px, calc((100% - 1240px) / 2)); background: var(--dark); color: #fff; }
.dark-head .eyebrow { color: #44e7d8; }
.dark-head h2 { color: #fff; }
.dark-head > p:last-child { color: #9bb6c1; }
.chain-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.chain-grid article { min-height: 240px; border: 1px solid rgba(255,255,255,.12); border-radius: 16px; padding: 24px; background: #0d3b4e; }
.chain-grid span { color: #44e7d8; font-size: 12px; font-weight: 800; }
.chain-grid h3 { margin: 50px 0 9px; font-size: 20px; }
.chain-grid p { margin: 0; color: #b2c8d0; font-size: 14px; line-height: 1.7; }

.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.scenario-grid article { min-height: 220px; padding: 26px; }
.scenario-grid p { margin: 0 0 34px; color: var(--accent-dark); font-size: 12px; font-weight: 800; }
.scenario-grid h3 { margin: 0 0 10px; font-size: 21px; }
.scenario-grid span { color: var(--muted); font-size: 14px; line-height: 1.7; }

.sources { padding-top: 20px; }
.source-card { display: grid; grid-template-columns: .82fr 1.18fr; gap: 36px; padding: 32px; }
.source-links { display: grid; gap: 8px; }
.source-links a { display: flex; min-height: 46px; align-items: center; justify-content: space-between; border: 1px solid var(--line); border-radius: 10px; padding: 0 14px; color: var(--ink); font-size: 13px; }
.source-links a:hover { border-color: var(--accent); color: var(--accent-dark); }

footer { display: flex; width: min(1240px, calc(100% - 48px)); align-items: center; justify-content: space-between; gap: 20px; margin: 0 auto; border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--muted); font-size: 13px; }
footer a { color: var(--accent-dark); font-weight: 800; }

@media (max-width: 1020px) {
  .ceramic-header nav { display: none; }
  .ceramic-hero { grid-template-columns: 1fr; }
  .hero-visual { max-width: 760px; }
  .service-grid, .chain-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  .ceramic-header { padding-inline: 14px; }
  .ceramic-brand small { display: none; }
  .header-action { padding-inline: 10px; font-size: 12px; }
  .ceramic-hero, .section, footer { width: min(100% - 28px, 1240px); }
  .ceramic-hero { min-height: auto; gap: 28px; margin-top: 14px; padding: 38px 22px 22px; }
  .hero-copy h1 { font-size: clamp(40px, 12vw, 54px); }
  .hero-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 15px 0; }
  .hero-metrics span:nth-child(3) { padding-left: 0; border-left: 0; }
  .section { padding: 60px 0; }
  .overview-grid, .source-card { grid-template-columns: 1fr; }
  .overview-points article { grid-template-columns: 1fr; gap: 8px; }
  .service-grid, .chain-grid, .scenario-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 290px; }
  footer { align-items: flex-start; flex-direction: column; }
}