:root{--ink:#102331;--muted:#5f7280;--line:rgba(255,255,255,.48);--glass:rgba(255,255,255,.62);--glass-strong:rgba(255,255,255,.78);--red:#d93438;--blue:#5cb7d9;--deep:#0c2c3c;--paper:#f6fbfc}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:linear-gradient(180deg,#eef8fb 0%,#f8fbfa 44%,#eef5f6 100%);color:var(--ink);font-family:Inter,Arial,"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.glass-top{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px clamp(18px,4vw,64px);background:rgba(247,251,252,.72);backdrop-filter:blur(20px) saturate(1.2);border-bottom:1px solid rgba(16,35,49,.08)}.brand-mark{display:flex;align-items:center;gap:10px;min-width:0}.brand-mark span{width:34px;height:34px;border-radius:14px;background:radial-gradient(circle at 35% 30%,#fff 0 15%,#78d8ea 16% 35%,#d93438 36% 62%,#173b50 63%);box-shadow:0 12px 28px rgba(217,52,56,.18)}.brand-mark b{white-space:nowrap}.brand-mark small{font-size:12px;color:var(--muted)}.glass-top nav{display:flex;gap:8px;flex-wrap:wrap}.glass-top nav a,.hero-actions a,.notice-glass a,.support-band a,.help-grid a,.related-links a{padding:9px 14px;border:1px solid rgba(16,35,49,.14);border-radius:999px;background:rgba(255,255,255,.72);backdrop-filter:blur(12px);font-weight:800;transition:transform .24s ease,background .24s ease,box-shadow .24s ease}.glass-top nav a:hover,.hero-actions a:hover,.notice-glass a:hover,.help-grid a:hover,.related-links a:hover{transform:translateY(-2px);background:white;box-shadow:0 12px 28px rgba(16,35,49,.12)}.menu-button{display:none;border:1px solid rgba(16,35,49,.16);border-radius:999px;background:white;padding:8px 12px;font-weight:800}.plateau-hero{position:relative;min-height:calc(100vh - 64px);display:grid;align-items:end;padding:clamp(28px,6vw,80px);overflow:hidden}.hero-media{position:absolute;inset:0;z-index:-2}.hero-media img{width:100%;height:100%;object-fit:cover}.hero-media:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(244,249,249,.88),rgba(244,249,249,.35) 48%,rgba(12,44,60,.16)),linear-gradient(0deg,rgba(244,249,249,.9),transparent 42%)}.hero-glass{max-width:720px;padding:clamp(24px,4vw,46px);border:1px solid var(--line);border-radius:28px;background:linear-gradient(135deg,rgba(255,255,255,.78),rgba(255,255,255,.42));backdrop-filter:blur(22px) saturate(1.25);box-shadow:0 30px 90px rgba(16,35,49,.18)}.hero-glass h1{font-size:clamp(34px,5vw,64px);line-height:1.06;margin:12px 0 18px;letter-spacing:0}.hero-title-line{display:block;white-space:nowrap}.hero-glass p{font-size:18px;max-width:620px;color:#2b4453}.eyebrow{margin:0;color:var(--red);font-weight:900;text-transform:uppercase;letter-spacing:.09em;font-size:12px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:24px}.route-glow{position:absolute;right:8vw;bottom:12vh;width:34vw;height:34vw;border-radius:50%;background:radial-gradient(circle,rgba(92,183,217,.26),transparent 62%);filter:blur(4px);z-index:-1}.quick-glass{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:-42px clamp(18px,6vw,80px) 44px;position:relative;z-index:3}.quick-glass a,.advantages article,.route-map article,.platform-grid article,.guide-grid article,.faq-glass details,.feature-ridge article,.notice-glass,.step-river article,.ridge-lanes article,.scenario-table article,.help-grid article,.legal-grid article{border:1px solid rgba(255,255,255,.58);border-radius:22px;background:linear-gradient(135deg,rgba(255,255,255,.78),rgba(255,255,255,.42));backdrop-filter:blur(18px) saturate(1.2);box-shadow:0 18px 60px rgba(16,35,49,.11);padding:22px}.quick-glass span,.route-map span,.platform-grid span,.guide-grid span,.scenario-table span{display:block;color:var(--red);font-size:12px;font-weight:900;text-transform:uppercase}.quick-glass b{display:block;margin-top:6px}.advantages,.route-map-section,.platform-section,.guide-section,.faq-glass,.inner-hero,.feature-ridge,.notice-glass,.step-river,.ridge-lanes,.scenario-table,.help-grid,.legal-grid{max-width:1180px;margin:46px auto;padding:0 20px}.advantages{display:grid;grid-template-columns:1.25fr .9fr .9fr;gap:18px}.advantages span{display:inline-grid;place-items:center;width:42px;height:42px;border-radius:16px;background:#0f3546;color:white;font-weight:900}.section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:18px;border-bottom:1px solid rgba(16,35,49,.12);padding-bottom:12px}.section-head h2,.inner-hero h1{font-size:clamp(30px,4vw,54px);line-height:1.08;margin:6px 0}.route-map{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.route-map article{position:relative;overflow:hidden}.route-map article:after{content:"";position:absolute;right:-20px;bottom:-20px;width:120px;height:120px;border:1px solid rgba(217,52,56,.25);border-radius:50%}.route-map h3{min-height:78px}.platform-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.platform-grid h3{font-size:21px}.platform-grid ul{padding-left:18px;margin:10px 0 0}.guide-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.guide-grid time{display:inline-block;margin:6px 0;color:var(--muted);font-size:13px}.faq-glass details{margin-bottom:12px}.faq-glass summary{cursor:pointer;font-weight:900}.inner-hero{padding-top:34px}.inner-hero p{max-width:860px;color:#395464;font-size:18px}.feature-ridge,.step-river,.ridge-lanes,.scenario-table,.help-grid,.legal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.scenario-table{grid-template-columns:repeat(4,1fr)}.notice-glass{display:flex;align-items:center;justify-content:space-between;gap:24px}.article-glass{max-width:880px;margin:46px auto;padding:0 22px}.article-glass h1{font-size:clamp(32px,5vw,56px);line-height:1.08}.article-glass time{color:var(--muted)}.article-summary{font-size:19px;color:#315061;border-left:4px solid var(--red);padding-left:18px}.article-glass section{margin-top:26px;padding-top:20px;border-top:1px solid rgba(16,35,49,.12)}.related-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.plateau-footer{margin-top:72px;padding:32px clamp(18px,6vw,80px);background:#102331;color:white;display:flex;justify-content:space-between;gap:24px}.plateau-footer p{max-width:520px;color:#c6d8df}.plateau-footer nav{display:flex;gap:10px;flex-wrap:wrap}.plateau-footer a{color:white;border-bottom:1px solid rgba(255,255,255,.42)}[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}[data-reveal].is-visible{opacity:1;transform:none}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}[data-reveal]{opacity:1;transform:none;transition:none}.glass-top nav a,.hero-actions a{transition:none}}@media(max-width:980px){.quick-glass,.route-map,.platform-grid,.scenario-table{grid-template-columns:repeat(2,1fr)}.advantages,.feature-ridge,.step-river,.ridge-lanes,.help-grid,.legal-grid{grid-template-columns:1fr}.plateau-hero{min-height:760px}.hero-glass h1{font-size:clamp(30px,8.4vw,52px)}}@media(max-width:680px){body{overflow-x:hidden}.brand-mark small{display:none}.menu-button{display:block}.glass-top nav{display:none;position:absolute;left:16px;right:16px;top:64px;background:rgba(255,255,255,.94);border:1px solid rgba(16,35,49,.14);border-radius:20px;padding:12px;box-shadow:0 18px 40px rgba(16,35,49,.16)}.glass-top nav.is-open{display:grid}.plateau-hero{min-height:690px;padding:20px 16px 28px}.hero-glass{border-radius:22px;padding:22px}.hero-glass h1{font-size:clamp(26px,8vw,40px)}.hero-glass p,.inner-hero p{font-size:16px}.quick-glass,.route-map,.platform-grid,.guide-grid,.scenario-table{grid-template-columns:1fr}.quick-glass{margin:18px 16px 34px}.section-head{display:block}.notice-glass,.plateau-footer{display:block}.notice-glass a{display:inline-block;margin-top:12px}.advantages,.route-map-section,.platform-section,.guide-section,.faq-glass,.inner-hero,.feature-ridge,.notice-glass,.step-river,.ridge-lanes,.scenario-table,.help-grid,.legal-grid{margin:34px auto}.plateau-footer nav{margin-top:16px}.route-map h3{min-height:0}}