:root{--navy:#172554;--blue:#3568eb;--sky:#72d4f2;--coral:#ff786c;--yellow:#ffd85a;--mint:#bcebd8;--lav:#d9d3ff;--paper:#f8fafc;--white:#fff;--ink:#1f2b4d;--muted:#687491;--line:#dce4f2;--max:1180px;--nav:70px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Microsoft YaHei UI","Microsoft YaHei",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.skip{position:fixed;left:10px;top:-60px;z-index:100;padding:9px 14px;background:white}.skip:focus{top:8px}
.topbar{position:fixed;inset:0 0 auto;z-index:30;height:var(--nav);background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.navrow{height:100%;display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:10px;color:var(--navy);font-weight:900;letter-spacing:-.03em}.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:11px 4px 11px 4px;color:white;background:var(--blue);font-family:Georgia,serif;font-size:22px;box-shadow:5px 5px 0 var(--yellow)}.brand small{display:block;color:#8a96ad;font-size:8px;font-weight:700;letter-spacing:.14em}.navlinks{display:flex;align-items:center;gap:clamp(16px,2.2vw,30px);font-size:14px}.navlinks>a:not(.button):hover,.navlinks>a[aria-current=page]{color:var(--blue)}.menu{display:none;width:42px;height:42px;border:1px solid var(--line);background:white;color:var(--navy);font-size:20px}
.button{display:inline-flex;align-items:center;justify-content:center;min-width:128px;min-height:45px;padding:10px 19px;border:2px solid var(--blue);border-radius:10px;color:white;background:var(--blue);font-weight:800;white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;transition:transform .18s,box-shadow .18s}.button:hover{transform:translateY(-2px);box-shadow:4px 5px 0 #17388f}.button.alt{color:var(--blue);background:white}.button.small{min-width:105px;min-height:38px;padding:7px 13px;font-size:13px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--coral);outline-offset:3px}
.hero{position:relative;overflow:hidden;padding:calc(var(--nav) + 72px) 0 80px;background:#e8f5ff}.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(#c9e0f6 1px,transparent 1px),linear-gradient(90deg,#c9e0f6 1px,transparent 1px);background-size:32px 32px;opacity:.42}.hero-layout{position:relative;display:grid;grid-template-columns:.92fr 1.08fr;align-items:center;gap:64px}.kicker{display:inline-block;margin-bottom:18px;padding:5px 10px;border:2px solid var(--navy);color:var(--navy);background:var(--yellow);font-size:11px;font-weight:900;letter-spacing:.08em}.hero h1,.pagehero h1{margin:0 0 22px;font-size:clamp(44px,6vw,78px);line-height:1.05;letter-spacing:-.05em;text-wrap:balance}.hero h1 em{color:var(--blue);font-style:normal}.hero-copy>p{max-width:590px;margin:0 0 29px;color:#52617f;font-size:17px}.actions{display:flex;flex-wrap:wrap;gap:10px}.microfacts{display:flex;flex-wrap:wrap;gap:17px;margin-top:28px;color:#596887;font-size:12px}.microfacts span::before{content:"✓";margin-right:5px;color:var(--blue);font-weight:900}.hero-media{position:relative;align-self:center;height:auto;padding:0;margin:0;border:3px solid var(--navy);background:white;box-shadow:14px 14px 0 var(--yellow)}.note{position:absolute;right:-15px;bottom:-28px;z-index:2;width:210px;padding:16px;color:var(--navy);background:var(--coral);box-shadow:5px 6px 0 var(--navy);font-size:12px;font-weight:700}.note b{display:block;margin-bottom:4px;font-size:16px}
.ticker{overflow:hidden;color:white;background:var(--navy)}.ticker-inner{display:flex;justify-content:space-between;gap:24px;padding:12px 0;font-size:11px;font-weight:800;letter-spacing:.08em}.ticker b{color:var(--yellow)}
.section{padding:clamp(75px,8.5vw,112px) 0}.white{background:white}.section-title{display:grid;grid-template-columns:1fr .72fr;align-items:end;gap:45px;margin-bottom:42px}.section-title h2{margin:0;font-size:clamp(34px,4.4vw,54px);line-height:1.12;letter-spacing:-.04em;text-wrap:balance}.section-title p{margin:0;color:var(--muted)}.eyebrow{display:block;margin-bottom:11px;color:var(--blue);font-size:11px;font-weight:900;letter-spacing:.12em}
.subjects{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}.subject{grid-column:span 2;min-height:225px;padding:25px;border:2px solid var(--navy);background:white;box-shadow:5px 5px 0 #cad7f2}.subject:nth-child(1),.subject:nth-child(6){grid-column:span 3}.subject:nth-child(1){background:var(--yellow)}.subject:nth-child(2){background:#e7f8ff}.subject:nth-child(3){background:#fff0ed}.subject:nth-child(4){background:#eef0ff}.subject:nth-child(5){background:#eaf9f2}.subject:nth-child(6){background:var(--lav)}.subject-icon{display:grid;place-items:center;width:44px;height:44px;margin-bottom:37px;border:2px solid var(--navy);border-radius:50%;color:white;background:var(--blue);font-weight:900}.subject h3{margin:0 0 6px;font-size:21px}.subject p{margin:0;color:#596783;font-size:13px}
.download-board{display:grid;grid-template-columns:260px 1fr;border:2px solid var(--navy);background:white;box-shadow:9px 9px 0 var(--sky)}.board-intro{padding:30px;color:white;background:var(--blue)}.board-intro h3{font-size:28px;line-height:1.2}.board-intro p{color:#dce6ff;font-size:13px}.platform-list{display:grid;grid-template-columns:1fr 1fr}.platform{display:grid;grid-template-columns:52px 1fr auto;align-items:center;gap:15px;padding:23px;border-bottom:1px solid var(--line)}.platform:nth-child(odd){border-right:1px solid var(--line)}.platform:nth-child(n+3){border-bottom:0}.platform-logo{display:grid;place-items:center;width:49px;height:49px;border-radius:13px;background:#edf3ff;color:var(--blue);font-size:20px;font-weight:900}.platform h3,.platform p{margin:0}.platform h3{font-size:16px}.platform p{color:var(--muted);font-size:11px}
.campus-stage{position:relative;padding:0;background:var(--navy)}.stage-grid{display:grid;grid-template-columns:1.05fr .95fr;min-height:570px}.stage-image{height:100%;min-height:570px}.stage-image img{display:block;width:100%;height:100%;object-fit:cover}.stage-copy{padding:65px clamp(30px,5vw,70px);color:white}.stage-copy .eyebrow{color:var(--yellow)}.stage-copy h2{font-size:clamp(35px,4.5vw,55px);line-height:1.1}.scene-line{display:grid;grid-template-columns:110px 1fr;gap:18px;padding:21px 0;border-top:1px solid #41507d}.scene-line:last-child{border-bottom:1px solid #41507d}.scene-line b{color:var(--sky);font-size:12px}.scene-line h3,.scene-line p{margin:0}.scene-line p{color:#aeb9d3;font-size:12px}
.reviews{display:grid;grid-template-columns:1fr 1.25fr 1fr;gap:10px;align-items:start}.review{padding:25px;border:1px solid var(--line);background:white}.review:nth-child(2){margin-top:30px;border:2px solid var(--blue);box-shadow:7px 7px 0 var(--yellow)}.quote{margin:0 0 24px;color:#44516e}.student{display:flex;align-items:center;gap:11px;padding-top:15px;border-top:1px dashed #b8c4d9}.avatar{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;color:white;background:var(--coral);font-weight:900}.student strong,.student small{display:block}.student small{color:var(--muted)}
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;align-items:center}.plan{padding:30px;border:2px solid var(--navy);background:white}.plan.hot{padding-block:46px;color:white;background:var(--blue);box-shadow:8px 8px 0 var(--yellow)}.label{display:inline-block;margin-bottom:18px;padding:4px 8px;border:1px solid currentColor;font-size:10px;font-weight:900}.plan h3{font-size:25px}.price{color:var(--muted)}.price b{color:var(--navy);font-size:28px}.plan.hot .price,.plan.hot li{color:#dbe5ff}.plan.hot .price b{color:white}.plan ul{list-style:none;padding:0;margin:22px 0}.plan li{margin:8px 0;color:var(--muted);font-size:13px}.plan li::before{content:"●";margin-right:8px;color:var(--coral);font-size:8px}
.faq{max-width:900px;margin:auto}.faq details{border-bottom:2px solid var(--navy);background:white}.faq details:first-child{border-top:2px solid var(--navy)}.faq summary{position:relative;padding:21px 53px 21px 5px;list-style:none;cursor:pointer;font-weight:800}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"＋";position:absolute;right:9px;top:15px;color:var(--blue);font-size:25px}.faq details[open] summary::after{content:"－"}.answer{padding:0 52px 21px 5px;color:var(--muted)}
.pagehero{padding:calc(var(--nav) + 65px) 0 70px;background:#e8f5ff;border-bottom:2px solid var(--navy)}.pagegrid{display:grid;grid-template-columns:1fr .85fr;align-items:center;gap:60px}.pagehero p{max-width:600px;color:#55627f}.page-image{border:3px solid var(--navy);box-shadow:10px 10px 0 var(--yellow)}
.downloads{display:grid;grid-template-columns:1fr 1fr;gap:10px}.download{display:grid;grid-template-columns:65px 1fr;gap:19px;padding:27px;border:2px solid var(--navy);background:white}.download .platform-logo{width:62px;height:62px}.download h2{margin:0 0 5px;font-size:21px}.download p{margin:0 0 15px;color:var(--muted);font-size:12px}.tags{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:15px}.tags span{padding:3px 7px;background:#edf3ff;color:var(--blue);font-size:9px;font-weight:800}.notice{margin-top:18px;padding:17px 20px;border:2px solid #d5b52f;background:#fff8d8}
.help-layout{display:grid;grid-template-columns:230px 1fr;gap:42px;align-items:start}.help-nav{position:sticky;top:92px;padding:9px;border:2px solid var(--navy);background:white;box-shadow:5px 5px 0 var(--yellow)}.help-nav a{display:block;padding:10px 12px;border-bottom:1px dashed #bdc8da;font-size:13px}.help-nav a:last-child{border:0}.help-nav a:hover{color:var(--blue);background:#eef4ff}.help-main section{margin-bottom:58px}.help-main h2{font-size:30px}.steps{display:grid;gap:8px;counter-reset:item}.step{position:relative;padding:18px 18px 18px 65px;border:1px solid var(--line);background:white}.step::before{counter-increment:item;content:counter(item);position:absolute;left:17px;top:17px;display:grid;place-items:center;width:31px;height:31px;border-radius:50%;color:white;background:var(--blue);font-weight:900}
.footer{padding:58px 0 22px;color:white;background:var(--navy);border-top:7px solid var(--yellow)}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:38px;padding-bottom:38px}.footer-intro p{max-width:320px;color:#aeb9d3;font-size:12px}.footer h3{color:var(--yellow);font-size:13px}.footer ul{list-style:none;padding:0;margin:0}.footer li{margin:8px 0}.footer a{color:#aeb9d3;font-size:12px}.footer a:hover{color:white}.copyright{display:flex;justify-content:space-between;gap:20px;padding-top:20px;border-top:1px solid #41507d;color:#8794b2;font-size:11px}
@media(max-width:930px){.menu{display:block}.navlinks{position:fixed;top:var(--nav);left:0;right:0;display:none;flex-direction:column;align-items:stretch;padding:20px;background:white;border-bottom:2px solid var(--navy)}.navlinks.open{display:flex}.hero-layout,.pagegrid,.stage-grid{grid-template-columns:1fr}.subjects .subject{grid-column:span 3}.download-board{grid-template-columns:1fr}.stage-image{min-height:360px}.reviews,.plans{grid-template-columns:1fr}.review:nth-child(2){margin-top:0}.plan.hot{order:-1}.footer-grid{grid-template-columns:1fr 1fr}.footer-intro{grid-column:1/-1}}
@media(max-width:650px){.section-title{grid-template-columns:1fr}.subjects{display:flex;flex-direction:column}.platform-list,.downloads{grid-template-columns:1fr}.platform:nth-child(odd){border-right:0}.platform:nth-child(3){border-bottom:1px solid var(--line)}.platform{grid-template-columns:46px 1fr}.platform .button{grid-column:1/-1}.stage-image{min-height:250px}.scene-line{grid-template-columns:1fr}.help-layout{grid-template-columns:1fr}.help-nav{position:static;display:flex;overflow-x:auto}.help-nav a{white-space:nowrap;border-right:1px dashed #bdc8da;border-bottom:0}.footer-grid{grid-template-columns:1fr 1fr}.copyright{flex-direction:column}.note{right:-3px}.download{grid-template-columns:1fr}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition-duration:.01ms!important}}
/* Hero 图片最终覆盖：居中、自然高度、无裁切与变形 */
.hero-layout{align-items:center}.hero-media{align-self:center;height:auto;padding:0;margin:0;overflow:visible;transform:none}.hero-media img{display:block;width:100%;height:auto;object-fit:contain;object-position:center;min-height:0;max-height:none;margin:0;padding:0;clip-path:none;transform:none}