:root {
  --ink: #102121;
  --ink-soft: #294241;
  --teal: #0e3937;
  --teal-2: #14524d;
  --mint: #b8ef94;
  --mint-soft: #e6f6d6;
  --orange: #ff9b65;
  --cream: #f5f7ef;
  --paper: #ffffff;
  --line: #dce6da;
  --muted: #6a7d78;
  --shadow: 0 18px 48px rgba(16, 33, 33, .10);
  --radius: 18px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--cream); color: var(--ink); font-family: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; line-height: 1.7; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(calc(100% - 36px), var(--max)); margin: 0 auto; }
.skip-link { position: absolute; left: -999px; }
.skip-link:focus { left: 16px; top: 16px; z-index: 30; background: var(--mint); padding: 8px 12px; border-radius: 8px; }

.site-header { position: sticky; top: 0; z-index: 20; background: rgba(245,247,239,.92); backdrop-filter: blur(14px); border-bottom: 1px solid rgba(220,230,218,.8); }
.nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .02em; }
.brand-mark { width: 38px; height: 38px; position: relative; display: inline-block; }
.brand-mark span { position: absolute; width: 16px; height: 8px; border-radius: 2px; background: var(--teal); transform: skewX(-18deg); }
.brand-mark span:nth-child(1) { left: 2px; bottom: 4px; }
.brand-mark span:nth-child(2) { left: 11px; bottom: 14px; background: var(--orange); }
.brand-mark span:nth-child(3) { left: 20px; bottom: 24px; background: var(--mint); }
.brand-mark:after { content: ""; position: absolute; right: 2px; top: 2px; width: 6px; height: 6px; border-radius: 50%; background: var(--orange); }
.brand-name { font-size: 18px; }
.brand-sub { font-size: 10px; color: var(--muted); font-weight: 700; letter-spacing: .12em; display: block; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 9px 13px; border-radius: 10px; font-size: 14px; color: var(--ink-soft); font-weight: 700; }
.nav-links a:hover, .nav-links a[aria-current="page"] { background: var(--mint-soft); color: var(--teal); }
.nav-toggle { display: none; border: 0; background: transparent; font-size: 25px; color: var(--teal); }

.hero { padding: 64px 0 72px; background: var(--teal); color: #f5f8ef; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.eyebrow { color: var(--mint); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.18; margin: 0 0 16px; letter-spacing: -.02em; }
h1 { font-size: clamp(38px, 6vw, 70px); max-width: 660px; }
h2 { font-size: clamp(26px, 4vw, 40px); }
h3 { font-size: 20px; }
.hero-copy { color: #c9dad0; max-width: 570px; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 11px; padding: 0 18px; font-weight: 800; font-size: 14px; border: 1px solid transparent; transition: transform .2s ease, background .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--mint); color: var(--teal); }
.btn-secondary { border-color: rgba(245,248,239,.4); color: #f5f8ef; }
.btn-light { background: var(--paper); color: var(--teal); }
.hero-meta { display: flex; gap: 20px; margin-top: 30px; color: #b6cbc0; font-size: 13px; }
.hero-meta strong { display: block; color: var(--mint); font-size: 20px; }
.hero-art { position: relative; min-height: 370px; }
.board { position: absolute; inset: 18px 8px 14px 28px; padding: 22px; border: 1px solid rgba(184,239,148,.35); border-radius: 24px; background: linear-gradient(145deg, #1a5952, #0c2d2d); box-shadow: 0 24px 80px rgba(0,0,0,.28); transform: rotate(3deg); }
.board-top { display: flex; justify-content: space-between; color: #b8d8cb; font-size: 12px; }
.board-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin: 24px 0; }
.tile { aspect-ratio: 1; border-radius: 9px; border: 1px solid rgba(184,239,148,.22); background: rgba(245,248,239,.08); }
.tile.active { background: var(--orange); box-shadow: 0 0 0 4px rgba(255,155,101,.18); }
.tile.mint { background: var(--mint); }
.board-foot { display: flex; align-items: end; justify-content: space-between; }
.score { color: #e9f4e4; font-size: 38px; font-weight: 800; }
.score small { display: block; color: #a2c4b7; font-size: 11px; font-weight: 500; }
.ladder-line { position: absolute; left: 3%; bottom: 7%; width: 72%; height: 18px; border-left: 5px solid var(--mint); border-bottom: 5px solid var(--mint); transform: skewY(-26deg) rotate(-2deg); opacity: .85; }
.ladder-line:before, .ladder-line:after { content: ""; position: absolute; height: 5px; width: 90px; background: var(--orange); transform: rotate(26deg); transform-origin: left; }
.ladder-line:before { left: 80px; top: -35px; } .ladder-line:after { left: 176px; top: -80px; }

.section { padding: 76px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 30px; }
.section-head p { margin: 0; color: var(--muted); max-width: 500px; }
.kicker { color: var(--teal-2); font-size: 12px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 10px; }
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-card, .article-card, .faq-item, .info-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 8px 28px rgba(16,33,33,.05); }
.feature-card { padding: 24px 20px; min-height: 220px; }
.feature-icon { width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center; margin-bottom: 22px; background: var(--mint-soft); color: var(--teal); font-size: 22px; font-weight: 900; }
.feature-card p, .article-card p { color: var(--muted); margin: 0; font-size: 14px; }
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.article-card { overflow: hidden; }
.article-cover { aspect-ratio: 16 / 9; background: var(--teal); display: grid; place-items: center; color: var(--mint); font-size: 42px; font-weight: 900; letter-spacing: -.08em; }
.article-body { padding: 20px; }
.article-meta { display: flex; gap: 10px; color: var(--muted); font-size: 12px; margin-bottom: 10px; }
.article-card h3 { font-size: 18px; margin-bottom: 9px; }
.text-link { color: var(--teal-2); font-weight: 800; font-size: 14px; }
.text-link:hover { color: #0c7e72; }
.split-panel { background: var(--ink); color: #eff8ee; border-radius: 24px; padding: 42px; display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: center; }
.split-panel p { color: #b9ccc2; }
.steps { display: grid; gap: 14px; }
.step { display: flex; gap: 14px; align-items: start; padding: 15px 0; border-bottom: 1px solid rgba(184,239,148,.18); }
.step-num { width: 29px; height: 29px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; background: var(--orange); color: var(--ink); font-size: 13px; font-weight: 900; }
.step strong { display: block; margin-bottom: 2px; }
.step span { color: #b9ccc2; font-size: 13px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { padding: 0 18px; }
.faq-item summary { cursor: pointer; list-style: none; padding: 17px 0; font-weight: 800; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:after { content: "+"; float: right; color: var(--teal-2); font-size: 22px; line-height: 1; }
.faq-item[open] summary:after { content: "−"; }
.faq-item p { color: var(--muted); padding: 0 0 16px; margin: 0; font-size: 14px; }
.cta-band { background: var(--mint); padding: 34px 0; }
.cta-band-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.cta-band h2 { color: var(--teal); font-size: clamp(24px, 4vw, 34px); margin: 0; }
.site-footer { background: var(--ink); color: #c2d2ca; padding: 54px 0 22px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 28px; }
.site-footer .brand { color: #f3f7ef; }
.footer-title { color: var(--mint); font-size: 13px; font-weight: 800; margin-bottom: 12px; }
.footer-links { display: grid; gap: 8px; font-size: 13px; }
.footer-links a:hover { color: var(--mint); }
.footer-bottom { border-top: 1px solid rgba(194,210,202,.2); margin-top: 38px; padding-top: 17px; display: flex; justify-content: space-between; gap: 12px; font-size: 12px; color: #89a199; }

.page-hero { padding: 54px 0 50px; background: var(--teal); color: #f5f8ef; }
.page-hero p { color: #bed0c6; max-width: 650px; margin: 0; }
.breadcrumb { color: #91b3a7; font-size: 13px; margin-bottom: 18px; }
.breadcrumb a:hover { color: var(--mint); }
.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 34px; align-items: start; }
.article-list { display: grid; gap: 16px; }
.article-row { display: grid; grid-template-columns: 180px 1fr; gap: 20px; background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.article-row .article-cover { border-radius: 12px; min-height: 118px; }
.article-row h3 { margin: 4px 0 7px; font-size: 19px; }
.side-panel { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; position: sticky; top: 96px; }
.side-panel h3 { font-size: 18px; }
.side-links { display: grid; gap: 8px; font-size: 14px; }
.side-links a { padding: 8px 10px; border-radius: 8px; color: var(--ink-soft); }
.side-links a:hover { background: var(--mint-soft); color: var(--teal); }
.article-content { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(22px, 4vw, 44px); }
.article-content .article-meta { margin-bottom: 24px; }
.article-content h1 { font-size: clamp(32px, 5vw, 50px); color: var(--teal); }
.article-content h2 { font-size: 27px; margin-top: 34px; }
.article-content h3 { font-size: 20px; margin-top: 25px; }
.article-content p, .article-content li { color: var(--ink-soft); }
.article-content ul { padding-left: 20px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.tag { background: var(--mint-soft); color: var(--teal-2); border-radius: 999px; padding: 5px 10px; font-size: 12px; font-weight: 800; }
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 20px; }
.article-nav a { padding: 15px; background: var(--mint-soft); border-radius: 12px; font-weight: 800; font-size: 13px; }
.article-nav a:last-child { text-align: right; }

@media (max-width: 900px) {
  .hero-grid, .split-panel { grid-template-columns: 1fr; }
  .hero { padding-top: 46px; }
  .hero-art { min-height: 300px; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .side-panel { position: static; }
}
@media (max-width: 680px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .site-header { position: static; }
  .nav-toggle { display: block; }
  .nav-links { display: none; position: absolute; left: 14px; right: 14px; top: 66px; padding: 10px; background: var(--paper); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); }
  .nav-links.open { display: grid; }
  .nav-links a { padding: 12px; }
  .brand-sub { display: none; }
  .hero { padding: 42px 0 50px; }
  h1 { font-size: 39px; }
  .hero-copy { font-size: 15px; }
  .hero-meta { gap: 16px; }
  .section { padding: 56px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 10px; }
  .card-grid, .article-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: auto; }
  .split-panel { padding: 26px 22px; border-radius: 18px; }
  .cta-band-inner { display: block; }
  .cta-band .btn { margin-top: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .footer-bottom { display: block; }
  .footer-bottom span { display: block; margin-top: 6px; }
  .article-row { grid-template-columns: 1fr; }
  .article-row .article-cover { min-height: 150px; }
  .article-nav { grid-template-columns: 1fr; }
  .article-nav a:last-child { text-align: left; }
}