:root{--red:#c81738;--deep:#78142c;--gold:#c99643;--ink:#2b2024;--muted:#72686b;--paper:#fcfaf8;--line:#e8dfe0;--soft:#fff4ef}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.7 "Microsoft YaHei","PingFang SC",Arial,sans-serif}a{text-decoration:none;color:inherit}.wrap{width:min(1180px,calc(100% - 56px));margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid #f0e1e3;backdrop-filter:blur(14px)}.nav{height:76px;display:flex;align-items:center;gap:28px}.brand{color:var(--red);font:700 30px/1 "STKaiti","KaiTi","Songti SC",serif;letter-spacing:.06em}.brand span{font:700 21px/1 "Microsoft YaHei",sans-serif;margin-left:5px;letter-spacing:.05em}.links{display:flex;gap:27px;margin-left:auto;color:#63555a;font-size:14px}.links a{padding:25px 0;position:relative}.links a:hover{color:var(--red)}.nav-cta{padding:10px 18px;background:var(--red);color:#fff;border-radius:4px;font-size:13px;box-shadow:0 8px 18px rgba(200,23,56,.18)}.menu{display:none;margin-left:auto;border:0;background:none;color:var(--red);font-size:25px}
.video{height:calc(100svh - 76px);min-height:560px;position:relative;overflow:hidden;background:radial-gradient(circle at 75% 38%,#bc3454 0,transparent 34%),linear-gradient(125deg,#210815,#74122c 58%,#bb2b4c)}.video video{width:100%;height:100%;object-fit:cover;display:block;opacity:.78;mix-blend-mode:screen}.video:before{content:"";position:absolute;inset:0;z-index:1;background-image:linear-gradient(rgba(242,196,110,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(242,196,110,.14) 1px,transparent 1px);background-size:52px 52px;mask-image:radial-gradient(circle at 67% 46%,black,transparent 70%);animation:gridmove 14s linear infinite}.video:after{content:"";position:absolute;inset:0;z-index:1;background:linear-gradient(90deg,rgba(31,3,14,.8),rgba(35,5,17,.2) 63%,rgba(33,4,15,.45))}.video-copy{position:absolute;z-index:3;left:max(28px,calc((100% - 1180px)/2));bottom:58px;color:#fff}.video-copy strong{display:block;font:700 clamp(34px,5vw,66px)/1.15 "Songti SC","STSong",serif;letter-spacing:.06em}.video-copy span{display:block;margin-top:12px;color:#f6d99f;font-size:14px}.video-btn{position:absolute;right:max(28px,calc((100% - 1180px)/2));bottom:49px;z-index:3;width:46px;height:46px;border:1px solid rgba(255,255,255,.7);background:rgba(36,5,16,.32);border-radius:50%;color:#fff;cursor:pointer}@keyframes gridmove{to{background-position:52px 52px,-52px 0}}
.hero{position:relative;overflow:hidden;padding:94px 0 106px;color:#fff;background:linear-gradient(120deg,#76132d,#ba183b 56%,#dd4054)}.hero:after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:52px 52px;mask-image:linear-gradient(90deg,black,transparent 80%)}.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:65px;align-items:center}.hero h1{margin:0 0 23px;font:700 clamp(48px,6vw,80px)/1.12 "Songti SC","STSong",serif;letter-spacing:.04em}.hero h1 span{display:block;color:#ffe2a4}.hero p{max-width:610px;margin:0 0 32px;color:#ffe9eb;font-size:18px}.actions{display:flex;gap:13px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 24px;border-radius:4px;font-size:14px}.btn-gold{background:var(--gold);color:#fff}.btn-outline{border:1px solid #f4d18b;color:#ffe3a5}.hero-panel{border:1px solid rgba(255,225,169,.43);padding:30px;background:rgba(66,6,24,.25)}.hero-panel h2{margin:0 0 22px;font:700 25px/1.35 "Songti SC",serif}.metrics{display:grid;grid-template-columns:1fr 1fr;gap:20px}.metric{border-top:1px solid rgba(255,225,169,.35);padding-top:10px}.metric strong{display:block;color:#ffdf9b;font:700 31px "Songti SC",serif}.metric small{color:#f8dfe2;font-size:13px}
.section{padding:98px 0}.section-head{display:flex;justify-content:space-between;gap:28px;align-items:flex-end;margin-bottom:38px}.eyebrow{color:var(--red);font-size:12px;font-weight:700;letter-spacing:.16em;margin-bottom:10px}.section h2{margin:0;font:700 clamp(30px,4vw,48px)/1.22 "Songti SC","STSong",serif}.lead{max-width:500px;color:var(--muted);margin:0}.platform{display:grid;grid-template-columns:.92fr 1.08fr;gap:62px;align-items:center}.visual{min-height:340px;display:grid;place-items:center;position:relative;overflow:hidden;border:1px solid #edd7cc;background:linear-gradient(145deg,#fff,#fff7f1)}.visual:before,.visual:after{content:"";position:absolute;border:1px solid rgba(201,150,67,.43);border-radius:50%}.visual:before{width:260px;height:260px}.visual:after{width:400px;height:400px;border-color:rgba(200,23,56,.12)}.core{z-index:1;width:126px;height:126px;border-radius:50%;display:grid;place-items:center;background:var(--red);color:#fff;font:700 27px/1.2 "Songti SC",serif;box-shadow:0 0 0 12px #fff5ef,0 0 0 13px #e6c687}.node{position:absolute;z-index:2;padding:8px 13px;background:#fff;border:1px solid var(--line);font-size:13px;box-shadow:0 8px 22px rgba(80,35,29,.08)}.node:nth-of-type(3){top:27px}.node:nth-of-type(4){right:20px}.node:nth-of-type(5){bottom:27px}.node:nth-of-type(6){left:20px}.caps{display:grid;grid-template-columns:1fr 1fr;gap:18px}.cap{border-top:1px solid var(--line);padding-top:17px}.cap h3{margin:0 0 4px;font-size:18px}.cap p{margin:0;color:var(--muted);font-size:14px}.soft{background:var(--soft)}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.card{padding:25px;background:#fff;border:1px solid var(--line);min-height:195px;transition:.2s}.card:hover{transform:translateY(-4px);box-shadow:0 16px 30px rgba(76,27,34,.1)}.card strong{display:block;color:var(--red);font:700 26px "Songti SC",serif;margin-bottom:12px}.card h3{margin:0 0 7px;font-size:19px}.card p{margin:0;color:var(--muted);font-size:14px}
.course-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.course{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);padding:23px 19px;min-height:220px}.course:after{content:"";position:absolute;right:-28px;bottom:-31px;width:105px;height:105px;border:1px solid #e4c27f;border-radius:50%}.tag{display:inline-block;padding:4px 9px;color:var(--red);background:#fff0f1;font-size:12px}.course h3{margin:20px 0 8px;font:700 21px "Songti SC",serif}.course p{margin:0;color:var(--muted);font-size:13px}.note{margin-top:23px;border-left:3px solid var(--gold);padding:15px 18px;background:#fff;color:var(--muted);font-size:14px}.dark{background:#7c1730;color:#fff}.dark .eyebrow{color:#f3d28a}.dark h2{color:#fff}.dark .lead{color:#f5dfe3}.strength{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.strength .card{background:rgba(255,255,255,.07);border-color:rgba(255,226,171,.34);color:#fff}.strength .card p{color:#f5dfe3}.steps{display:grid;grid-template-columns:repeat(3,1fr);margin-top:32px}.step{border-left:1px solid rgba(255,226,171,.4);padding:5px 22px}.step strong{color:#ffe1a0;font:700 34px "Songti SC",serif}.step h4{margin:0;font-size:17px}.step p{margin:3px 0;color:#f5dfe3;font-size:13px}.global{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}.quote{margin:0;color:var(--red);font:700 clamp(31px,4vw,54px)/1.3 "Songti SC",serif}.global-list{display:grid;gap:13px}.global-item{padding:13px 17px;border-left:3px solid var(--gold);background:#fff}.global-item h3{margin:0 0 3px;font-size:17px}.global-item p{margin:0;color:var(--muted);font-size:13px}.news{display:grid;grid-template-columns:repeat(3,1fr);gap:17px}.news article{padding:22px;background:#fff;border-top:3px solid var(--red);min-height:195px}.news time{color:var(--red);font-weight:700;font-size:12px}.news h3{margin:11px 0 8px;font-size:18px}.news p{margin:0;color:var(--muted);font-size:14px}.contact{background:#a81937;color:#fff}.contact-grid{display:grid;grid-template-columns:1fr .9fr;gap:56px}.contact h2{font-size:clamp(34px,4vw,52px);color:#fff}.contact p{color:#f9dfe4}.contact-links{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:26px}.chip{min-height:102px;padding:15px;border:1px solid rgba(255,234,214,.45);background:rgba(255,255,255,.08);display:flex;flex-direction:column;justify-content:space-between}.chip span{font-size:11px;color:#f8d8dd}.form{padding:27px;background:#fff;color:var(--ink);display:grid;gap:12px;box-shadow:0 20px 45px rgba(73,9,27,.2)}.form h3{margin:0;font:700 23px "Songti SC",serif}.form small{color:var(--muted)}.form label{font-size:12px;color:var(--muted)}.form input,.form select{display:block;width:100%;padding:11px;margin-top:5px;border:1px solid var(--line);font:inherit}.form button{border:0;cursor:pointer;font:inherit}.form-msg{color:#7e4a52;font-size:13px}.footer{padding:23px 0;background:#4a1121;color:#f3d8dc;font-size:12px}.footer .wrap{display:flex;justify-content:space-between}
@media(max-width:850px){.wrap{width:min(100% - 40px,680px)}.links,.nav-cta{display:none}.menu{display:block}.video{height:calc(100svh - 68px);min-height:460px}.video-copy{left:20px;bottom:30px}.video-copy strong{font-size:39px}.video-btn{right:20px;bottom:23px}.hero{padding:72px 0}.hero-grid,.platform,.global,.contact-grid{grid-template-columns:1fr;gap:34px}.section{padding:72px 0}.section-head{display:block;margin-bottom:29px}.lead{margin-top:15px}.cards,.strength,.news{grid-template-columns:1fr}.course-grid{grid-template-columns:1fr 1fr}.contact-links{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr;gap:13px}.step{border-left:0;border-top:1px solid rgba(255,226,171,.4);padding:13px 0}.footer .wrap{display:block}.footer .wrap div+div{margin-top:7px}}
@media(max-width:480px){.wrap{width:calc(100% - 32px)}.nav{height:68px}.brand{font-size:26px}.video-copy strong{font-size:31px}.hero h1{font-size:46px}.hero p{font-size:16px}.course-grid{grid-template-columns:1fr}.contact-links{grid-template-columns:1fr}.caps{grid-template-columns:1fr}}

.topbar{position:fixed;top:0;left:0;right:0;background:transparent;border-bottom-color:transparent;backdrop-filter:none;transition:background .28s ease,border-color .28s ease,box-shadow .28s ease}.topbar .brand,.topbar .links,.topbar .menu{color:#fff}.topbar .links a:hover{color:#ffe0a1}.topbar .nav-cta{background:rgba(255,255,255,.1);border:1px solid rgba(255,232,181,.8);box-shadow:none}.topbar.scrolled{background:rgba(255,255,255,.97);border-bottom-color:#f0e1e3;backdrop-filter:blur(14px);box-shadow:0 5px 20px rgba(60,15,25,.07)}.topbar.scrolled .brand,.topbar.scrolled .links,.topbar.scrolled .menu{color:var(--red)}.topbar.scrolled .links a:hover{color:var(--red)}.topbar.scrolled .nav-cta{background:var(--red);border-color:var(--red);color:#fff;box-shadow:0 8px 18px rgba(200,23,56,.18)}
  :root{--nav-height:76px}
  html{scroll-padding-top:calc(var(--nav-height) + 16px)}
  .topbar .nav{height:var(--nav-height)}
  .topbar .brand,.topbar .links,.topbar .menu{transition:color .28s ease;text-shadow:0 1px 12px rgba(0,0,0,.3)}
  .topbar.scrolled .brand,.topbar.scrolled .links,.topbar.scrolled .menu{ text-shadow:none }
  .video{height:100vh;height:100svh;min-height:0;background:#78142c;isolation:isolate}
  .video video{opacity:1;mix-blend-mode:normal;object-position:center}
  .video:before{content:none;animation:none}
  .video:after{pointer-events:none;background:linear-gradient(180deg,rgba(20,12,18,.52),transparent 22%,transparent 67%,rgba(20,12,18,.5))}
  .video-copy{right:100px;text-shadow:0 2px 18px rgba(0,0,0,.35)}
  .video-copy span{color:#fff4dc}
  .video-btn{font:inherit;font-size:17px;backdrop-filter:blur(8px)}
  .video-btn:focus-visible,.menu:focus-visible,.nav a:focus-visible{outline:2px solid var(--gold);outline-offset:5px}
  .video-status{position:absolute;z-index:3;right:28px;bottom:105px;color:#fff;font-size:13px}
  .video-status:empty{display:none}
  @media(max-width:850px){
    :root{--nav-height:68px}
    .topbar.menu-open{background:#fff;border-bottom-color:#f0e1e3}
    .topbar.menu-open .brand,.topbar.menu-open .links,.topbar.menu-open .menu{color:var(--red);text-shadow:none}
    .topbar.menu-open .links{display:flex;position:absolute;top:var(--nav-height);left:0;right:0;margin:0;padding:12px 20px 20px;background:#fff;flex-direction:column;gap:0;box-shadow:0 16px 24px rgba(60,15,25,.08);max-height:calc(100svh - var(--nav-height));overflow:auto}
    .topbar.menu-open .links a{padding:12px 0}
    .topbar.menu-open .links a:hover{color:var(--deep)}
    .video-copy{left:20px;right:85px;bottom:max(30px,env(safe-area-inset-bottom))}
    .video-btn{bottom:max(25px,env(safe-area-inset-bottom))}
    .video-copy span{font-size:12px;line-height:1.7}
  }
  @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.topbar,.topbar .brand,.topbar .links,.topbar .menu{transition:none}}
  /* 细化首屏控件：品牌只在导航出现，视频保留业务说明；操作按钮采用紧凑矩形状态 */
  /* 首屏导航：让品牌与视频的金色光感自然衔接，导航项保持居中 */
  .topbar .brand{color:var(--red)}
  .topbar .brand span{color:#f0cf88}
  .topbar:not(.scrolled) .links{color:rgba(255,244,224,.9);font-size:15px;font-weight:500;letter-spacing:.05em}
  .topbar:not(.scrolled) .links a:hover{color:#ffe0a1}
  .nav{position:relative}
  .links{position:absolute;left:50%;transform:translateX(-50%);margin-left:0;white-space:nowrap}
  .nav-cta{padding:8px 18px;min-height:34px;font-size:13px;line-height:1.2;margin-left:auto}
  .topbar .nav-cta{background:var(--red);border:1px solid rgba(255,226,171,.78);color:#fff;box-shadow:0 8px 20px rgba(92,8,27,.24)}
  .video-copy strong{display:none}
  .video-copy span{margin-top:0;color:rgba(224,215,216,.78);font-size:13px;text-shadow:0 1px 10px rgba(0,0,0,.38)}
  .video-btn{width:58px;min-width:58px;height:36px;padding:0;border-radius:4px;font-size:16px;line-height:1;color:rgba(235,226,226,.88);border-color:rgba(235,226,226,.58)}
  @media(max-width:850px){.links{position:absolute;left:0;transform:none}.video-btn{width:52px;min-width:52px;height:34px;font-size:15px}}