/* ============================================================
   京峰教育 · 深空科技风设计系统 (共享CSS)
   ============================================================ */
:root{
  --bg:#060912;--bg2:#0a0f1e;--surface:#0f1528;--surface2:#141c38;
  --glass:rgba(255,255,255,.035);--glass2:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.08);--border2:rgba(255,255,255,.14);
  --blue:#4f7cff;--purple:#a855f7;--cyan:#06b6d4;--pink:#ec4899;
  --green:#22c55e;--orange:#f97316;--gold:#eab308;
  --text:#eaf0fa;--text2:#9ba6bf;--text3:#5a6480;
  --grad:linear-gradient(135deg,#4f7cff 0%,#a855f7 50%,#06b6d4 100%);
  --grad-blue:linear-gradient(135deg,#4f7cff,#06b6d4);
  --grad-purple:linear-gradient(135deg,#a855f7,#ec4899);
  --grad-dark:linear-gradient(180deg,#0a0f1e,#060912);
  --font-display:'Sora',system-ui,sans-serif;
  --font-body:'Noto Sans SC',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:16px;--radius-lg:24px;--radius-xl:32px;
  --shadow:0 20px 60px rgba(0,0,0,.5);
  --shadow-glow:0 0 40px rgba(79,124,255,.15);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:20px;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ===== 环境背景 ===== */
#bgCanvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5}
.bg-orbs{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.12}
.bg-orb--1{width:500px;height:500px;background:#4f7cff;top:-10%;left:-5%;animation:drift1 25s ease-in-out infinite}
.bg-orb--2{width:400px;height:400px;background:#a855f7;top:40%;right:-10%;animation:drift2 30s ease-in-out infinite}
.bg-orb--3{width:350px;height:350px;background:#06b6d4;bottom:10%;left:30%;animation:drift3 28s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0)}50%{transform:translate(60px,40px)}}
@keyframes drift2{0%,100%{transform:translate(0,0)}50%{transform:translate(-50px,60px)}}
@keyframes drift3{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-50px)}}

/* ===== 网格背景叠加 ===== */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(79,124,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(79,124,255,.04) 1px,transparent 1px);
  background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 30%,transparent 80%)}

/* ===== 滚动进度 ===== */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:10000;transition:width .1s}

/* ===== 容器 ===== */
.container{max-width:1200px;margin:0 auto;padding:0 40px;position:relative;z-index:1}
.container-wide{max-width:1400px;margin:0 auto;padding:0 40px;position:relative;z-index:1}

/* ===== 导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .3s ease}
.header.is-scrolled{background:rgba(6,9,18,.92);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border-bottom:1px solid var(--border);box-shadow:0 4px 30px rgba(0,0,0,.3)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px}
.brand img{height:44px;filter:brightness(1.1)}
.nav-links{display:flex;align-items:center;gap:36px}
.nav-links a{font-family:var(--font-body);font-size:17px;color:var(--text2);font-weight:500;letter-spacing:.02em;transition:color .2s;position:relative;padding:4px 0}
.nav-links a:hover{color:var(--text)}
.nav-links a.is-active{color:var(--text);font-weight:600}
.nav-links a.is-active::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--grad);border-radius:2px}
.nav-links a:hover::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:2px;background:var(--border2);border-radius:2px;transition:.2s}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-btn{padding:10px 26px;border-radius:12px;font-size:16px;font-weight:600;letter-spacing:.03em;background:var(--grad);color:#fff;transition:all .25s;white-space:nowrap;box-shadow:0 4px 16px rgba(79,124,255,.25)}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 8px 28px rgba(79,124,255,.45)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;background:var(--glass);border:1px solid var(--border);align-items:center;justify-content:center}
.nav-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}

/* ===== 抽屉 ===== */
.drawer{position:fixed;inset:0;z-index:9999;visibility:hidden;opacity:0;transition:.3s}
.drawer.is-open{visibility:visible;opacity:1}
.drawer__scrim{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.drawer__panel{position:absolute;right:0;top:0;bottom:0;width:280px;background:var(--bg2);border-left:1px solid var(--border);padding:80px 24px 24px;display:flex;flex-direction:column;gap:4px;transform:translateX(20px);transition:.3s}
.drawer.is-open .drawer__panel{transform:translateX(0)}
.drawer__panel a{padding:12px 16px;border-radius:10px;font-size:17px;color:var(--text2);transition:.2s}
.drawer__panel a:hover{background:var(--glass);color:var(--text)}
.drawer__panel .nav-btn{margin-top:12px;text-align:center;padding:12px}

/* ===== 面包屑 ===== */
.breadcrumb{padding:88px 0 0;position:relative;z-index:1}
.breadcrumb .container-wide,.breadcrumb .container{display:flex;align-items:center;gap:8px;font-size:15px;color:var(--text3)}
.breadcrumb a{color:var(--text2);transition:.2s}
.breadcrumb a:hover{color:var(--text)}
.breadcrumb .sep{color:var(--text3)}
.breadcrumb .cur{color:var(--text2)}

/* ===== HERO 通用 ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:120px 0 80px;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:1fr 540px;gap:80px;align-items:center}
.hero__badges{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:32px}
.hero__badge{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:20px;font-size:15px;font-weight:600;background:var(--glass);border:1px solid var(--border);color:var(--text2);backdrop-filter:blur(10px)}
.hero__badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:pulse 2s ease-in-out infinite}
.hero__badge--gold{border-color:rgba(234,179,8,.3);color:var(--gold)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-family:var(--font-display);font-size:clamp(2.4rem,5vw,4rem);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline}
.hero__tip{font-size:19px;color:var(--text2);margin-bottom:48px;line-height:1.8}
.hero__tip p+p{margin-top:4px}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:12px;font-size:16px;font-weight:600;transition:all .25s;cursor:pointer;white-space:nowrap}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 8px 32px rgba(79,124,255,.35)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(79,124,255,.5)}
.btn--ghost{background:var(--glass);border:1px solid var(--border2);color:var(--text);backdrop-filter:blur(10px)}
.btn--ghost:hover{background:var(--glass2);border-color:var(--blue)}
.btn--warm{background:linear-gradient(135deg,#f97316,#eab308);color:#fff;box-shadow:0 8px 32px rgba(249,115,22,.35)}
.btn--warm:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(249,115,22,.5)}
.btn--lg{padding:14px 32px;font-size:17px}
.hero__trust{display:flex;gap:28px;flex-wrap:wrap}
.hero__trust>div{display:flex;flex-direction:column;gap:2px}
.hero__trust b{font-size:16px;color:var(--text)}
.hero__trust span{font-size:14px;color:var(--text3)}

/* ===== Hero 终端面板 ===== */
.hero-panel{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow),var(--shadow-glow)}
.hero-panel::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(79,124,255,.06),rgba(168,85,247,.06));pointer-events:none}
.hero-panel__header{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.2)}
.hero-panel__dots{display:flex;gap:6px}
.hero-panel__dots span{width:10px;height:10px;border-radius:50%}
.hero-panel__dots span:nth-child(1){background:#ff5f57}.hero-panel__dots span:nth-child(2){background:#febc2e}.hero-panel__dots span:nth-child(3){background:#28c840}
.hero-panel__title{font-family:var(--font-mono);font-size:14px;color:var(--text3);flex:1;text-align:center}
.hero-panel__status{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--green)}
.hero-panel__led{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 6px var(--green);animation:pulse 2s infinite}
.hero-panel__courses{padding:18px;display:flex;flex-direction:column;gap:10px}
.hpcard{display:flex;align-items:center;gap:14px;padding:14px;border-radius:14px;background:var(--glass);border:1px solid var(--border);transition:all .3s;cursor:pointer}
.hpcard:hover{background:var(--glass2);border-color:var(--blue);transform:translateX(4px)}
.hpcard__icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.hpcard--linux .hpcard__icon{background:rgba(79,124,255,.15);color:var(--blue)}
.hpcard--k8s .hpcard__icon{background:rgba(168,85,247,.15);color:var(--purple)}
.hpcard--ai .hpcard__icon{background:rgba(6,182,212,.15);color:var(--cyan)}
.hpcard__body{flex:1;display:flex;flex-direction:column;gap:2px}
.hpcard__label{font-size:16px;font-weight:600;color:var(--text)}
.hpcard__sub{font-size:11px;color:var(--text3)}
.hpcard__arrow{color:var(--text3);flex-shrink:0}
.hero-panel__terminal{display:flex;align-items:center;gap:8px;padding:12px 18px;border-top:1px solid var(--border);background:rgba(0,0,0,.25);font-family:var(--font-mono);font-size:15px}
.term-prompt{color:var(--green)}.term-cmd{color:var(--text2)}
.term-cursor{width:8px;height:16px;background:var(--cyan);animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
.hero-panel__footer{display:flex;align-items:center;gap:14px;padding:16px 18px;border-top:1px solid var(--border)}
.hero-panel__footer img{width:60px;height:60px;border-radius:10px}
.hero-panel__qr-text{font-size:14px;color:var(--text2);line-height:1.5}
.hero-panel__glow{position:absolute;border-radius:50%;filter:blur(40px);pointer-events:none}
.hero-panel__glow--1{width:200px;height:200px;background:rgba(79,124,255,.15);top:-50px;right:-50px}
.hero-panel__glow--2{width:150px;height:150px;background:rgba(168,85,247,.1);bottom:30%;left:-30px}

/* ===== 通用 Section ===== */
.section{position:relative;padding:100px 0;z-index:1}
.section--alt{background:var(--bg2)}
.section--soft{background:rgba(10,15,30,.5)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.eyebrow{display:inline-block;padding:4px 14px;border-radius:20px;font-size:14px;font-weight:600;letter-spacing:.05em;background:var(--glass);border:1px solid var(--border);color:var(--cyan);margin-bottom:16px;text-transform:uppercase}
.section-title{font-family:var(--font-display);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:700;letter-spacing:-.02em;margin-bottom:12px}
.section-sub{font-size:17px;color:var(--text2);line-height:1.7}

/* ===== 玻璃卡片基础 ===== */
.glass-card{background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:all .3s}
.glass-card:hover{background:var(--glass2);border-color:var(--border2);transform:translateY(-4px)}

/* ===== 信任数据条 ===== */
.trust-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:32px;background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);backdrop-filter:blur(20px)}
.trust-item{text-align:center}
.trust-item__num{font-family:var(--font-display);font-size:2rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.trust-item__lbl{font-size:15px;color:var(--text2);margin-top:4px}

/* ===== 课程卡片 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.course-card{position:relative;padding:32px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border);overflow:hidden;transition:all .35s}
.course-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--card-grad,var(--grad))}
.course-card::after{content:'';position:absolute;top:-60px;right:-60px;width:160px;height:160px;border-radius:50%;background:var(--card-grad,var(--grad));filter:blur(50px);opacity:.08;transition:.35s}
.course-card:hover{transform:translateY(-6px);border-color:var(--border2);box-shadow:0 20px 50px rgba(0,0,0,.4)}
.course-card:hover::after{opacity:.16}
.course__tag{display:inline-block;padding:4px 12px;border-radius:20px;font-size:11px;font-weight:600;background:var(--glass2);border:1px solid var(--border);margin-bottom:16px}
.course__title{font-family:var(--font-display);font-size:20px;font-weight:700;margin-bottom:20px;line-height:1.3}
.course__list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.course__list li{display:flex;align-items:flex-start;gap:10px;font-size:16px;color:var(--text2);line-height:1.5}
.course__list li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--blue);flex-shrink:0;margin-top:7px}
.course__more{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--cyan);transition:gap .2s}
.course__more:hover{gap:10px}

/* ===== 全周期 Journey ===== */
.journey{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
.journey__step{position:relative;padding:24px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);transition:all .3s}
.journey__step:hover{background:var(--glass2);border-color:var(--blue);transform:translateY(-3px)}
.journey__num{font-family:var(--font-mono);font-size:1.5rem;font-weight:600;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}
.journey__body h4{font-size:18px;font-weight:600;margin-bottom:8px}
.journey__body p{font-size:15px;color:var(--text2);line-height:1.6}

/* ===== 服务体系 ===== */
.svc-journey{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:48px;flex-wrap:wrap}
.svc-journey__item{text-align:center;min-width:120px}
.svc-journey__icon{width:48px;height:48px;margin:0 auto 8px;border-radius:14px;background:var(--glass2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--cyan)}
.svc-journey__n{font-family:var(--font-mono);font-size:11px;color:var(--text3)}
.svc-journey__title{font-size:15px;font-weight:600;margin-top:2px}
.svc-journey__arrow{color:var(--text3);padding:0 4px}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.svc-card{padding:24px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);transition:all .3s;position:relative;overflow:hidden}
.svc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:.3s}
.svc-card:hover{background:var(--glass2);border-color:var(--border2);transform:translateY(-3px)}
.svc-card:hover::before{opacity:1}
.svc-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.svc-card__icon{width:36px;height:36px;border-radius:10px;background:var(--glass2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--cyan)}
.svc-card__n{font-family:var(--font-mono);font-size:14px;color:var(--text3)}
.svc-card h4{font-size:17px;font-weight:600;margin-bottom:8px}
.svc-card p{font-size:15px;color:var(--text2);line-height:1.6}

/* ===== 名师团队 ===== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.teacher{padding:24px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border);transition:all .3s;cursor:pointer}
.teacher:hover{background:var(--glass2);border-color:var(--blue);transform:translateY(-3px);box-shadow:0 12px 32px rgba(79,124,255,.15)}
.teacher__top{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.teacher__avatar{width:64px;height:64px;border-radius:16px;object-fit:cover;border:2px solid var(--border2)}
.teacher__name{font-size:18px;font-weight:700}
.teacher__role{font-size:15px;color:var(--cyan);margin-top:2px}
.teacher__body{font-size:15px;color:var(--text2);line-height:1.7}
.teacher__body p{margin-bottom:8px}.teacher__body p:last-child{margin-bottom:0}

/* ===== VIP 试听 ===== */
.vip{display:flex;gap:20px;padding:24px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border);transition:all .3s;align-items:center}
.vip:hover{border-color:var(--border2);transform:translateY(-3px)}
.vip__cover{width:80px;height:96px;flex-shrink:0;border-radius:14px;background:var(--glass2);display:flex;align-items:center;justify-content:center}
.vip__cover img{width:50px;height:50px}
.vip h3{font-size:18px;font-weight:700;margin-bottom:10px}
.vip__tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.vip__tags span{padding:3px 10px;border-radius:16px;font-size:11px;background:var(--glass2);border:1px solid var(--border);color:var(--text2)}
.vip__btn{font-size:16px;font-weight:600;color:var(--cyan)}

/* ===== 趋势数据 ===== */
.trend-stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:24px}
.trend-stat{text-align:center;padding:20px 8px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border)}
.trend-stat__num{font-family:var(--font-display);font-size:1.8rem;font-weight:800}
.trend-stat__num span{font-size:.8rem;font-weight:400}
.trend-stat__lbl{font-size:14px;color:var(--text2);margin-top:4px}
.trend-stat--hot{border-color:rgba(234,179,8,.3)}.trend-stat--hot .trend-stat__num{color:var(--gold)}
.trend-stat--alert{border-color:rgba(239,68,68,.3)}.trend-stat--alert .trend-stat__num{color:#ef4444}
.trend-tagline{text-align:center;font-size:17px;color:var(--orange);font-weight:600;margin-bottom:48px}
.timeline-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:32px}
.t3-card{padding:28px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border)}
.t3__marker{display:inline-block;padding:4px 12px;border-radius:16px;font-size:14px;font-weight:600;margin-bottom:16px}
.t3--past .t3__marker{background:rgba(148,163,184,.15);color:#94a3b8}
.t3--now .t3__marker{background:rgba(249,115,22,.15);color:var(--orange)}
.t3--future .t3__marker{background:rgba(34,197,94,.15);color:var(--green)}
.t3-card h4{font-size:18px;font-weight:700;margin-bottom:16px}
.t3-card ul{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.t3-card ul li{font-size:15px;color:var(--text2);padding-left:16px;position:relative}
.t3-card ul li::before{content:'';position:absolute;left:0;top:8px;width:4px;height:4px;border-radius:50%;background:var(--text3)}
.t3__verdict{padding:10px 14px;border-radius:10px;font-size:14px;font-weight:600;text-align:center}
.t3__verdict--bad{background:rgba(239,68,68,.1);color:#ef4444}
.t3__verdict--warn{background:rgba(249,115,22,.1);color:var(--orange)}
.t3__verdict--good{background:rgba(34,197,94,.1);color:var(--green)}
.trend-conclusion{max-width:640px;margin:0 auto;text-align:center}
.trend-conclusion blockquote{font-size:18px;line-height:1.8;color:var(--text);padding:24px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border)}
.trend-conclusion strong{color:var(--cyan)}
.trend-conclusion em{color:var(--gold);font-style:normal}

/* ===== 企业Logo墙 ===== */
.company-marquee{overflow:hidden;padding:24px 0;mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.company-marquee__track{display:flex;gap:48px;animation:scrollLeft 30s linear infinite}
.company-marquee__track--right{animation:scrollRight 30s linear infinite}
.company-marquee__track img{height:50px;opacity:.6;filter:grayscale(.3);transition:.3s}
.company-marquee__track img:hover{opacity:1;filter:none}
@keyframes scrollLeft{to{transform:translateX(-50%)}}
@keyframes scrollRight{from{transform:translateX(-50%)}to{transform:translateX(0)}}

/* ===== FAQ ===== */
.faq{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq__item{border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);overflow:hidden;transition:all .3s}
.faq__item[open]{background:var(--glass2);border-color:var(--border2)}
.faq__q{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;font-size:17px;font-weight:500;cursor:pointer;list-style:none}
.faq__q::-webkit-details-marker{display:none}
.faq__icon{font-size:20px;color:var(--cyan);transition:transform .3s;flex-shrink:0}
.faq__item[open] .faq__icon{transform:rotate(45deg)}
.faq__a{padding:0 24px 18px;font-size:16px;color:var(--text2);line-height:1.7}

/* ===== CTA Band ===== */
.cta-band{text-align:center;padding:48px 32px;border-radius:var(--radius-xl);background:linear-gradient(135deg,rgba(79,124,255,.08),rgba(168,85,247,.08));border:1px solid var(--border);backdrop-filter:blur(20px);position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;top:-40%;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(ellipse,rgba(79,124,255,.12),transparent 70%);pointer-events:none}
.cta-band h2{font-family:var(--font-display);font-size:1.8rem;font-weight:700;margin-bottom:12px;position:relative}
.cta-band p{font-size:17px;color:var(--text2);margin-bottom:24px;position:relative}

/* ===== 页脚 ===== */
.footer{background:var(--bg2);border-top:1px solid var(--border);padding:60px 0 24px;position:relative;z-index:1}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:48px}
.footer__brand img{height:36px;margin-bottom:16px}
.footer__brand p{font-size:15px;color:var(--text2);line-height:1.7;margin-bottom:16px}
.footer__qr img{width:100px;height:100px;border-radius:10px}
.footer__col h5{font-size:16px;font-weight:600;margin-bottom:16px}
.footer__col a{display:block;font-size:15px;color:var(--text2);padding:4px 0;transition:.2s}
.footer__col a:hover{color:var(--text)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--border);font-size:14px;color:var(--text3)}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;bottom:24px;right:24px;width:44px;height:52px;border-radius:12px;background:var(--glass);border:1px solid var(--border);backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:center;color:var(--text);z-index:999;opacity:0;visibility:hidden;transition:all .3s}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--glass2);border-color:var(--blue)}

/* ===== 彩带礼炮 Canvas ===== */
#confettiCanvas{position:fixed;inset:0;z-index:9998;pointer-events:none}

/* ===== Teacher Modal ===== */
@property --tm-angle{syntax:'<angle>';initial-value:0deg;inherits:false}
.teacher-modal-overlay{position:fixed;inset:0;z-index:9999;background:rgba(6,9,18,.88);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .35s ease,visibility .35s ease;padding:24px}
.teacher-modal-overlay.active{opacity:1;visibility:visible}
.teacher-modal{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.06),var(--surface));border-radius:24px;max-width:680px;width:100%;max-height:80vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 40px 120px rgba(0,0,0,.7),0 0 100px rgba(79,124,255,.18);border:1px solid var(--border2);transform:scale(.85) translateY(40px);opacity:0;transition:transform .55s cubic-bezier(.16,1,.3,1),opacity .4s ease}
.teacher-modal-overlay.active .teacher-modal{transform:scale(1) translateY(0);opacity:1}
.teacher-modal::before{content:'';position:absolute;inset:-1px;border-radius:24px;padding:1px;background:conic-gradient(from var(--tm-angle),#4f7cff,#a855f7,#ec4899,#06b6d4,#4f7cff);-webkit-mask:linear-gradient(#fff 0 0) content-box,linear-gradient(#fff 0 0);-webkit-mask-composite:xor;mask-composite:exclude;animation:tmSpin 6s linear infinite;pointer-events:none;opacity:.75}
@keyframes tmSpin{to{--tm-angle:360deg}}
.teacher-modal__close{position:absolute;top:16px;right:16px;width:38px;height:38px;border-radius:12px;background:var(--glass2);border:1px solid var(--border);font-size:22px;color:var(--text2);transition:all .25s;z-index:3;display:flex;align-items:center;justify-content:center;backdrop-filter:blur(8px);cursor:pointer}
.teacher-modal__close:hover{background:rgba(239,68,68,.18);border-color:rgba(239,68,68,.5);color:#ef4444;transform:rotate(90deg)}
.teacher-modal__top{padding:44px 40px 28px;display:flex;gap:24px;align-items:center;position:relative;z-index:2;border-bottom:1px solid var(--border);background:linear-gradient(90deg,rgba(79,124,255,.06),transparent)}
.teacher-modal__avatar{width:96px;height:96px;flex-shrink:0;border-radius:22px;object-fit:cover;border:2px solid rgba(255,255,255,.25);box-shadow:0 10px 30px rgba(0,0,0,.4)}
.teacher-modal__name{font-family:var(--font-display);font-size:28px;font-weight:800;letter-spacing:-.01em;line-height:1.2}
.teacher-modal__role{font-size:15px;color:var(--cyan);margin-top:8px;font-weight:600}
.teacher-modal__body{position:relative;z-index:2;padding:32px 40px 40px;font-size:16px;line-height:1.85;color:var(--text2);overflow-y:auto;scrollbar-width:thin;scrollbar-color:rgba(79,124,255,.4) transparent}
.teacher-modal__body::-webkit-scrollbar{width:5px}
.teacher-modal__body::-webkit-scrollbar-track{background:transparent}
.teacher-modal__body::-webkit-scrollbar-thumb{background:rgba(79,124,255,.5);border-radius:3px}
.teacher-modal__body::-webkit-scrollbar-thumb:hover{background:rgba(79,124,255,.75)}
.teacher-modal__body p{margin-bottom:16px}.teacher-modal__body p:last-child{margin-bottom:0}

/* ===== WeChat Modal ===== */
.wx-modal-overlay{position:fixed;inset:0;z-index:9999;background:rgba(6,9,18,.8);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:.3s;padding:20px}
.wx-modal-overlay.show{opacity:1;visibility:visible}
.wx-modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center;max-width:360px;width:100%;transform:scale(.9);transition:.3s;position:relative}
.wx-modal-overlay.show .wx-modal{transform:scale(1)}
.wx-modal__close{position:absolute;top:12px;right:12px;width:32px;height:32px;border-radius:50%;background:var(--glass2);font-size:20px;color:var(--text2)}
.wx-modal__head h3{font-size:20px;font-weight:700;margin-bottom:6px}
.wx-modal__head p{font-size:15px;color:var(--text2)}
.wx-modal__qr{margin:20px auto;width:180px;height:180px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.wx-modal__qr img{width:100%;height:100%}
.wx-modal__tips{display:flex;gap:8px;justify-content:center;margin-bottom:12px}
.wx-modal__tips span{font-size:14px;padding:4px 12px;border-radius:16px;background:var(--glass2);border:1px solid var(--border)}
.wx-modal__note{font-size:14px;color:var(--text3)}

/* ===== Reveal 动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===== Scroll Hint ===== */
.scroll-hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--text3);animation:scrollHint 2s ease-in-out infinite}
@keyframes scrollHint{0%,100%{opacity:.4;transform:translateX(-50%) translateY(0)}50%{opacity:1;transform:translateX(-50%) translateY(6px)}}

/* ===== 课程大纲手风琴 ===== */
.syllabus{display:flex;flex-direction:column;gap:12px}
.syllabus-toggle{display:inline-block;margin:0 auto;padding:8px 20px;border-radius:10px;font-size:15px;font-weight:600;background:var(--glass);border:1px solid var(--border);color:var(--text2);transition:.2s;cursor:pointer}
.syllabus-toggle:hover{background:var(--glass2);color:var(--text)}
.stage-acc{border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);overflow:hidden;transition:all .3s}
.stage-acc[open]{background:var(--glass2);border-color:var(--border2)}
.stage-acc summary{display:flex;align-items:center;gap:16px;padding:18px 24px;cursor:pointer;list-style:none;transition:.2s}
.stage-acc summary::-webkit-details-marker{display:none}
.stage-acc summary:hover{background:var(--glass2)}
.stage-acc__no{font-family:var(--font-mono);font-size:15px;font-weight:600;color:var(--cyan);white-space:nowrap;flex-shrink:0}
.stage-acc__title{flex:1;font-size:17px;font-weight:600;color:var(--text)}
.stage-acc__chev{color:var(--text3);transition:transform .3s;flex-shrink:0}
.stage-acc[open] .stage-acc__chev{transform:rotate(180deg)}
.stage-acc__body{padding:0 24px 20px}
.module{margin-bottom:20px}
.module:last-child{margin-bottom:0}
.module__title{font-size:16px;font-weight:700;color:var(--text);margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid var(--border)}
.mod-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:6px}
.mod-list li{font-size:15px;color:var(--text2);line-height:1.6;padding-left:14px;position:relative}
.mod-list li::before{content:'';position:absolute;left:0;top:9px;width:4px;height:4px;border-radius:50%;background:var(--blue)}
.sub-list{margin-top:6px;padding-left:16px}
.sub-list li{font-size:14px;color:var(--text3)}
.sub-list li::before{background:var(--text3)}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero__inner{grid-template-columns:1fr;gap:48px}
  .hero-panel{max-width:480px;margin:0 auto}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .svc-grid{grid-template-columns:repeat(3,1fr)}
  .trend-stats{grid-template-columns:repeat(5,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .journey{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .hero{padding:110px 0 40px}
  .hero h1{font-size:2rem}
  .hero__trust{gap:16px}
  .grid-3,.grid-2,.svc-grid,.timeline-3,.journey{grid-template-columns:1fr}
  .trend-stats{grid-template-columns:repeat(2,1fr)}
  .trust-bar{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column;gap:8px;text-align:center}
  .svc-journey{gap:4px}
  .section{padding:56px 0}
  .vip{flex-direction:column;text-align:center}
  .mod-list{grid-template-columns:1fr}
}
@media(max-width:480px){
  .hero__badges{gap:6px}
  .hero__badge{font-size:11px;padding:4px 10px}
  .trend-stats{grid-template-columns:1fr}
  .trust-bar{grid-template-columns:1fr}
}

/* ===== 由 index.html 内联设计系统并入（组件类，确保主站一致） ===== */

/* ============================================================
   京峰教育 · 深空科技风设计系统
   ============================================================ */
:root{
  --bg:#060912;--bg2:#0a0f1e;--surface:#0f1528;--surface2:#141c38;
  --glass:rgba(255,255,255,.035);--glass2:rgba(255,255,255,.06);
  --border:rgba(255,255,255,.08);--border2:rgba(255,255,255,.14);
  --blue:#4f7cff;--purple:#a855f7;--cyan:#06b6d4;--pink:#ec4899;
  --green:#22c55e;--orange:#f97316;--gold:#eab308;
  --text:#eaf0fa;--text2:#9ba6bf;--text3:#5a6480;
  --grad:linear-gradient(135deg,#4f7cff 0%,#a855f7 50%,#06b6d4 100%);
  --grad-blue:linear-gradient(135deg,#4f7cff,#06b6d4);
  --grad-purple:linear-gradient(135deg,#a855f7,#ec4899);
  --grad-dark:linear-gradient(180deg,#0a0f1e,#060912);
  --font-display:'Sora',system-ui,sans-serif;
  --font-body:'Noto Sans SC',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --radius:16px;--radius-lg:24px;--radius-xl:32px;
  --shadow:0 20px 60px rgba(0,0,0,.5);
  --shadow-glow:0 0 40px rgba(79,124,255,.15);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}

/* ===== 环境背景 ===== */
#bgCanvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5}
.bg-orbs{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.bg-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.12}
.bg-orb--1{width:500px;height:500px;background:#4f7cff;top:-10%;left:-5%;animation:drift1 25s ease-in-out infinite}
.bg-orb--2{width:400px;height:400px;background:#a855f7;top:40%;right:-10%;animation:drift2 30s ease-in-out infinite}
.bg-orb--3{width:350px;height:350px;background:#06b6d4;bottom:10%;left:30%;animation:drift3 28s ease-in-out infinite}
@keyframes drift1{0%,100%{transform:translate(0,0)}50%{transform:translate(60px,40px)}}
@keyframes drift2{0%,100%{transform:translate(0,0)}50%{transform:translate(-50px,60px)}}
@keyframes drift3{0%,100%{transform:translate(0,0)}50%{transform:translate(30px,-50px)}}

/* ===== 网格背景叠加 ===== */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:linear-gradient(rgba(79,124,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(79,124,255,.04) 1px,transparent 1px);
  background-size:60px 60px;mask-image:radial-gradient(ellipse 80% 60% at 50% 40%,#000 30%,transparent 80%)}

/* ===== 滚动进度 ===== */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--grad);z-index:10000;transition:width .1s}

/* ===== 导航 ===== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;transition:all .3s}
.header.is-scrolled{background:rgba(6,9,18,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand img{height:36px;filter:brightness(1.1)}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{font-size:14px;color:var(--text2);font-weight:500;transition:color .2s;position:relative}
.nav-links a:hover,.nav-links a.is-active{color:var(--text)}
.nav-links a.is-active::after{content:'';position:absolute;bottom:-6px;left:0;right:0;height:2px;background:var(--grad);border-radius:2px}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-btn{padding:8px 20px;border-radius:10px;font-size:13px;font-weight:600;background:var(--grad);color:#fff;transition:all .25s;white-space:nowrap}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px rgba(79,124,255,.4)}
.nav-toggle{display:none;width:40px;height:40px;border-radius:10px;background:var(--glass);border:1px solid var(--border);align-items:center;justify-content:center}
.nav-toggle span{width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:'';position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px;transition:.3s}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}
.nav-toggle.is-open span{background:transparent}
.nav-toggle.is-open span::before{top:0;transform:rotate(45deg)}.nav-toggle.is-open span::after{top:0;transform:rotate(-45deg)}

/* ===== 抽屉 ===== */
.drawer{position:fixed;inset:0;z-index:9999;visibility:hidden;opacity:0;transition:.3s}
.drawer.is-open{visibility:visible;opacity:1}
.drawer__scrim{position:absolute;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px)}
.drawer__panel{position:absolute;right:0;top:0;bottom:0;width:280px;background:var(--bg2);border-left:1px solid var(--border);padding:80px 24px 24px;display:flex;flex-direction:column;gap:4px;transform:translateX(20px);transition:.3s}
.drawer.is-open .drawer__panel{transform:translateX(0)}
.drawer__panel a{padding:12px 16px;border-radius:10px;font-size:15px;color:var(--text2);transition:.2s}
.drawer__panel a:hover{background:var(--glass);color:var(--text)}
.drawer__panel .nav-btn{margin-top:12px;text-align:center;padding:12px}

/* ===== HERO ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;padding:100px 0 60px;overflow:hidden}
.hero__inner{display:grid;grid-template-columns:1fr 480px;gap:60px;align-items:center}
.hero__badges{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:24px}
.hero__badge{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:20px;font-size:12px;font-weight:600;background:var(--glass);border:1px solid var(--border);color:var(--text2);backdrop-filter:blur(10px)}
.hero__badge .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);animation:pulse 2s ease-in-out infinite}
.hero__badge--gold{border-color:rgba(234,179,8,.3);color:var(--gold)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero h1{font-family:var(--font-display);font-size:clamp(2.4rem,5vw,4rem);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin-bottom:20px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:inline}
.hero__tip{font-size:17px;color:var(--text2);margin-bottom:32px;line-height:1.8}
.hero__tip p+p{margin-top:4px}
.hero__actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 28px;border-radius:12px;font-size:14px;font-weight:600;transition:all .25s;cursor:pointer;white-space:nowrap}
.btn--primary{background:var(--grad);color:#fff;box-shadow:0 8px 32px rgba(79,124,255,.35)}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(79,124,255,.5)}
.btn--ghost{background:var(--glass);border:1px solid var(--border2);color:var(--text);backdrop-filter:blur(10px)}
.btn--ghost:hover{background:var(--glass2);border-color:var(--blue)}
.btn--warm{background:linear-gradient(135deg,#f97316,#eab308);color:#fff;box-shadow:0 8px 32px rgba(249,115,22,.35)}
.btn--warm:hover{transform:translateY(-2px);box-shadow:0 12px 40px rgba(249,115,22,.5)}
.btn--lg{padding:14px 32px;font-size:15px}
.hero__trust{display:flex;gap:28px;flex-wrap:wrap}
.hero__trust>div{display:flex;flex-direction:column;gap:2px}
.hero__trust b{font-size:14px;color:var(--text)}
.hero__trust span{font-size:12px;color:var(--text3)}

/* ===== Hero 终端面板 ===== */
.hero-panel{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow),var(--shadow-glow)}
.hero-panel::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(79,124,255,.06),rgba(168,85,247,.06));pointer-events:none}
.hero-panel__header{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--border);background:rgba(0,0,0,.2)}
.hero-panel__dots{display:flex;gap:6px}
.hero-panel__dots span{width:10px;height:10px;border-radius:50%}
.hero-panel__dots span:nth-child(1){background:#ff5f57}.hero-panel__dots span:nth-child(2){background:#febc2e}.hero-panel__dots span:nth-child(3){background:#28c840}
.hero-panel__title{font-family:var(--font-mono);font-size:12px;color:var(--text3);flex:1;text-align:center}
.hero-panel__status{display:flex;align-items:center;gap:5px;font-size:11px;color:var(--green)}
.hero-panel__led{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 6px var(--green);animation:pulse 2s infinite}
.hero-panel__courses{padding:18px;display:flex;flex-direction:column;gap:10px}
.hpcard{display:flex;align-items:center;gap:14px;padding:14px;border-radius:14px;background:var(--glass);border:1px solid var(--border);transition:all .3s;cursor:pointer}
.hpcard:hover{background:var(--glass2);border-color:var(--blue);transform:translateX(4px)}
.hpcard__icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.hpcard--linux .hpcard__icon{background:rgba(79,124,255,.15);color:var(--blue)}
.hpcard--k8s .hpcard__icon{background:rgba(168,85,247,.15);color:var(--purple)}
.hpcard--ai .hpcard__icon{background:rgba(6,182,212,.15);color:var(--cyan)}
.hpcard__body{flex:1;display:flex;flex-direction:column;gap:2px}
.hpcard__label{font-size:14px;font-weight:600;color:var(--text)}
.hpcard__sub{font-size:11px;color:var(--text3)}
.hpcard__arrow{color:var(--text3);flex-shrink:0}
.hero-panel__terminal{display:flex;align-items:center;gap:8px;padding:12px 18px;border-top:1px solid var(--border);background:rgba(0,0,0,.25);font-family:var(--font-mono);font-size:13px}
.term-prompt{color:var(--green)}.term-cmd{color:var(--text2)}
.term-cursor{width:8px;height:16px;background:var(--cyan);animation:blink 1s step-end infinite}
@keyframes blink{50%{opacity:0}}
.hero-panel__footer{display:flex;align-items:center;gap:14px;padding:16px 18px;border-top:1px solid var(--border)}
.hero-panel__footer img{width:60px;height:60px;border-radius:10px}
.hero-panel__qr-text{font-size:12px;color:var(--text2);line-height:1.5}
.hero-panel__glow{position:absolute;border-radius:50%;filter:blur(40px);pointer-events:none}
.hero-panel__glow--1{width:200px;height:200px;background:rgba(79,124,255,.15);top:-50px;right:-50px}
.hero-panel__glow--2{width:150px;height:150px;background:rgba(168,85,247,.1);bottom:30%;left:-30px}

/* ===== 通用 Section ===== */
.section{position:relative;padding:80px 0}
.section--alt{background:var(--bg2)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.eyebrow{display:inline-block;padding:4px 14px;border-radius:20px;font-size:12px;font-weight:600;letter-spacing:.05em;background:var(--glass);border:1px solid var(--border);color:var(--cyan);margin-bottom:16px;text-transform:uppercase}
.section-title{font-family:var(--font-display);font-size:clamp(1.6rem,3vw,2.4rem);font-weight:700;letter-spacing:-.02em;margin-bottom:12px}
.section-sub{font-size:15px;color:var(--text2);line-height:1.7}

/* ===== 玻璃卡片基础 ===== */
.glass-card{background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);transition:all .3s}
.glass-card:hover{background:var(--glass2);border-color:var(--border2);transform:translateY(-4px)}

/* ===== 信任数据条 ===== */
.trust-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:32px;background:var(--glass);border:1px solid var(--border);border-radius:var(--radius-lg);backdrop-filter:blur(20px)}
.trust-item{text-align:center}
.trust-item__num{font-family:var(--font-display);font-size:2rem;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.trust-item__lbl{font-size:13px;color:var(--text2);margin-top:4px}

/* ===== 课程卡片 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.course-card{position:relative;padding:32px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border);overflow:hidden;transition:all .35s}
.course-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--card-grad,var(--grad))}
.course-card::after{content:'';position:absolute;top:-60px;right:-60px;width:160px;height:160px;border-radius:50%;background:var(--card-grad,var(--grad));filter:blur(50px);opacity:.08;transition:.35s}
.course-card:hover{transform:translateY(-6px);border-color:var(--border2);box-shadow:0 20px 50px rgba(0,0,0,.4)}
.course-card:hover::after{opacity:.16}
.course__tag{display:inline-block;padding:4px 12px;border-radius:20px;font-size:11px;font-weight:600;background:var(--glass2);border:1px solid var(--border);margin-bottom:16px}
.course__title{font-family:var(--font-display);font-size:20px;font-weight:700;margin-bottom:20px;line-height:1.3}
.course__list{display:flex;flex-direction:column;gap:10px;margin-bottom:24px}
.course__list li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text2);line-height:1.5}
.course__list li::before{content:'';width:6px;height:6px;border-radius:50%;background:var(--blue);flex-shrink:0;margin-top:7px}
.course__more{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--cyan);transition:gap .2s}
.course__more:hover{gap:10px}

/* ===== 全周期 Journey ===== */
.journey{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;position:relative}
.journey__step{position:relative;padding:24px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);transition:all .3s}
.journey__step:hover{background:var(--glass2);border-color:var(--blue);transform:translateY(-3px)}
.journey__num{font-family:var(--font-mono);font-size:1.5rem;font-weight:600;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}
.journey__body h4{font-size:16px;font-weight:600;margin-bottom:8px}
.journey__body p{font-size:13px;color:var(--text2);line-height:1.6}

/* ===== 服务体系 ===== */
.svc-journey{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:40px;flex-wrap:wrap}
.svc-journey__item{text-align:center;min-width:120px}
.svc-journey__icon{width:48px;height:48px;margin:0 auto 8px;border-radius:14px;background:var(--glass2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--cyan)}
.svc-journey__n{font-family:var(--font-mono);font-size:11px;color:var(--text3)}
.svc-journey__title{font-size:13px;font-weight:600;margin-top:2px}
.svc-journey__arrow{color:var(--text3);padding:0 4px}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.svc-card{padding:24px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);transition:all .3s;position:relative;overflow:hidden}
.svc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--grad);opacity:0;transition:.3s}
.svc-card:hover{background:var(--glass2);border-color:var(--border2);transform:translateY(-3px)}
.svc-card:hover::before{opacity:1}
.svc-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.svc-card__icon{width:36px;height:36px;border-radius:10px;background:var(--glass2);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;color:var(--cyan)}
.svc-card__n{font-family:var(--font-mono);font-size:12px;color:var(--text3)}
.svc-card h4{font-size:15px;font-weight:600;margin-bottom:8px}
.svc-card p{font-size:13px;color:var(--text2);line-height:1.6}

/* ===== 名师团队 ===== */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.teacher{padding:24px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border);transition:all .3s;cursor:pointer}
.teacher:hover{background:var(--glass2);border-color:var(--blue);transform:translateY(-3px);box-shadow:0 12px 32px rgba(79,124,255,.15)}
.teacher__top{display:flex;align-items:center;gap:16px;margin-bottom:14px}
.teacher__avatar{width:64px;height:64px;border-radius:16px;object-fit:cover;border:2px solid var(--border2)}
.teacher__name{font-size:18px;font-weight:700}
.teacher__role{font-size:13px;color:var(--cyan);margin-top:2px}
.teacher__body{font-size:13px;color:var(--text2);line-height:1.7}
.teacher__body p{margin-bottom:8px}.teacher__body p:last-child{margin-bottom:0}

/* ===== VIP 试听 ===== */
.vip{display:flex;gap:20px;padding:24px;border-radius:var(--radius-lg);background:var(--surface);border:1px solid var(--border);transition:all .3s;align-items:center}
.vip:hover{border-color:var(--border2);transform:translateY(-3px)}
.vip__cover{width:80px;height:80px;flex-shrink:0;border-radius:14px;background:var(--glass2);display:flex;align-items:center;justify-content:center}
.vip__cover img{width:50px;height:50px}
.vip h3{font-size:18px;font-weight:700;margin-bottom:10px}
.vip__tags{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.vip__tags span{padding:3px 10px;border-radius:16px;font-size:11px;background:var(--glass2);border:1px solid var(--border);color:var(--text2)}
.vip__btn{font-size:14px;font-weight:600;color:var(--cyan)}

/* ===== 趋势数据 ===== */
.trend-stats{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:24px}
.trend-stat{text-align:center;padding:20px 8px;border-radius:var(--radius);background:var(--glass);border:1px solid var(--border)}
.trend-stat__num{font-family:var(--font-display);font-size:1.8rem;font-weight:800}
.trend-stat__num span{font-size:.8rem;font-weight:400}
.trend-stat__lbl{font-size:12px;color:var(--text2);margin-top:4px}
.trend-stat--hot{border-color:rgba(234,179,8,.3)}.trend-stat--hot .trend-stat__num{color:var(--gold)}
.trend-stat--alert{border-color:rgba(239,68,68,.3)}.trend-stat--alert .trend-stat__num{color:#ef4444}
.trend-tagline{text-align:center;font-size:15px;color:var(--orange);font-weight:600;margin-bottom:40px}
.timeline-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:32px}
.t3-card{padding:28px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border)}
.t3__marker{display:inline-block;padding:4px 12px;border-radius:16px;font-size:12px;font-weight:600;margin-bottom:16px}
.t3--past .t3__marker{background:rgba(148,163,184,.15);color:#94a3b8}
.t3--now .t3__marker{background:rgba(249,115,22,.15);color:var(--orange)}
.t3--future .t3__marker{background:rgba(34,197,94,.15);color:var(--green)}
.t3-card h4{font-size:18px;font-weight:700;margin-bottom:16px}
.t3-card ul{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.t3-card ul li{font-size:13px;color:var(--text2);padding-left:16px;position:relative}
.t3-card ul li::before{content:'';position:absolute;left:0;top:8px;width:4px;height:4px;border-radius:50%;background:var(--text3)}
.t3__verdict{padding:10px 14px;border-radius:10px;font-size:12px;font-weight:600;text-align:center}
.t3__verdict--bad{background:rgba(239,68,68,.1);color:#ef4444}
.t3__verdict--warn{background:rgba(249,115,22,.1);color:var(--orange)}
.t3__verdict--good{background:rgba(34,197,94,.1);color:var(--green)}
.trend-conclusion{max-width:640px;margin:0 auto;text-align:center}
.trend-conclusion blockquote{font-size:16px;line-height:1.8;color:var(--text);padding:24px;border-radius:var(--radius-lg);background:var(--glass);border:1px solid var(--border)}
.trend-conclusion strong{color:var(--cyan)}
.trend-conclusion em{color:var(--gold);font-style:normal}

/* ===== 企业Logo墙 ===== */
.company-marquee{overflow:hidden;padding:24px 0;mask-image:linear-gradient(90deg,transparent,#000 10%,#000 90%,transparent)}
.company-marquee__track{display:flex;gap:40px;animation:scrollLeft 30s linear infinite}
.company-marquee__track--right{animation:scrollRight 30s linear infinite}
.company-marquee__track img{height:50px;opacity:.6;filter:grayscale(.3);transition:.3s}
.company-marquee__track img:hover{opacity:1;filter:none}
@keyframes scrollLeft{to{transform:translateX(-50%)}}
@keyframes scrollRight{from{transform:translateX(-50%)}to{transform:translateX(0)}}

/* ===== FAQ ===== */
.faq{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq__item{border-radius:var(--radius);background:var(--glass);border:1px solid var(--border);overflow:hidden;transition:all .3s}
.faq__item[open]{background:var(--glass2);border-color:var(--border2)}
.faq__q{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;font-size:15px;font-weight:500;cursor:pointer;list-style:none}
.faq__q::-webkit-details-marker{display:none}
.faq__icon{font-size:20px;color:var(--cyan);transition:transform .3s;flex-shrink:0}
.faq__item[open] .faq__icon{transform:rotate(45deg)}
.faq__a{padding:0 24px 18px;font-size:14px;color:var(--text2);line-height:1.7}

/* ===== CTA Band ===== */
.cta-band{text-align:center;padding:48px 32px;border-radius:var(--radius-xl);background:linear-gradient(135deg,rgba(79,124,255,.08),rgba(168,85,247,.08));border:1px solid var(--border);backdrop-filter:blur(20px);position:relative;overflow:hidden}
.cta-band::before{content:'';position:absolute;top:-40%;left:50%;transform:translateX(-50%);width:600px;height:400px;background:radial-gradient(ellipse,rgba(79,124,255,.12),transparent 70%);pointer-events:none}
.cta-band h2{font-family:var(--font-display);font-size:1.8rem;font-weight:700;margin-bottom:12px;position:relative}
.cta-band p{font-size:15px;color:var(--text2);margin-bottom:24px;position:relative}

/* ===== 页脚 ===== */
.footer{background:var(--bg2);border-top:1px solid var(--border);padding:60px 0 24px;position:relative;z-index:1}
.footer__grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer__brand img{height:36px;margin-bottom:16px}
.footer__brand p{font-size:13px;color:var(--text2);line-height:1.7;margin-bottom:16px}
.footer__qr img{width:100px;height:100px;border-radius:10px}
.footer__col h5{font-size:14px;font-weight:600;margin-bottom:16px}
.footer__col a{display:block;font-size:13px;color:var(--text2);padding:4px 0;transition:.2s}
.footer__col a:hover{color:var(--text)}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--border);font-size:12px;color:var(--text3)}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:12px;background:var(--glass);border:1px solid var(--border);backdrop-filter:blur(20px);display:flex;align-items:center;justify-content:center;color:var(--text);z-index:999;opacity:0;visibility:hidden;transition:all .3s}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--glass2);border-color:var(--blue)}

/* ===== 彩带礼炮 Canvas ===== */
#confettiCanvas{position:fixed;inset:0;z-index:9998;pointer-events:none}

/* ===== WeChat Modal ===== */
.wx-modal-overlay{position:fixed;inset:0;z-index:9999;background:rgba(6,9,18,.8);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:.3s;padding:20px}
.wx-modal-overlay.show{opacity:1;visibility:visible}
.wx-modal{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;text-align:center;max-width:360px;width:100%;transform:scale(.9);transition:.3s;position:relative}
.wx-modal-overlay.show .wx-modal{transform:scale(1)}
.wx-modal__close{position:absolute;top:12px;right:12px;width:32px;height:32px;border-radius:50%;background:var(--glass2);font-size:18px;color:var(--text2)}
.wx-modal__head h3{font-size:20px;font-weight:700;margin-bottom:6px}
.wx-modal__head p{font-size:13px;color:var(--text2)}
.wx-modal__qr{margin:20px auto;width:180px;height:180px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border)}
.wx-modal__qr img{width:100%;height:100%}
.wx-modal__tips{display:flex;gap:8px;justify-content:center;margin-bottom:12px}
.wx-modal__tips span{font-size:12px;padding:4px 12px;border-radius:16px;background:var(--glass2);border:1px solid var(--border)}
.wx-modal__note{font-size:12px;color:var(--text3)}

/* ===== Reveal 动画 ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:translateY(0)}

/* ===== Scroll Hint ===== */
.scroll-hint{position:absolute;bottom:24px;left:50%;transform:translateX(-50%);font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;color:var(--text3);animation:scrollHint 2s ease-in-out infinite}
@keyframes scrollHint{0%,100%{opacity:.4;transform:translateX(-50%) translateY(0)}50%{opacity:1;transform:translateX(-50%) translateY(6px)}}

/* ===== 响应式 ===== */
@media(max-width:1024px){
  .hero__inner{grid-template-columns:1fr;gap:40px}
  .hero-panel{max-width:480px;margin:0 auto}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .svc-grid{grid-template-columns:repeat(3,1fr)}
  .trend-stats{grid-template-columns:repeat(5,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  .hero{padding:90px 0 40px}
  .hero h1{font-size:2rem}
  .hero__trust{gap:16px}
  .grid-3,.grid-2,.svc-grid,.timeline-3,.journey{grid-template-columns:1fr}
  .trend-stats{grid-template-columns:repeat(2,1fr)}
  .trust-bar{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .footer__bottom{flex-direction:column;gap:8px;text-align:center}
  .svc-journey{gap:4px}
  .section{padding:56px 0}
  .vip{flex-direction:column;text-align:center}
}
@media(max-width:480px){
  .hero__badges{gap:6px}
  .hero__badge{font-size:11px;padding:4px 10px}
  .trend-stats{grid-template-columns:1fr}
  .trust-bar{grid-template-columns:1fr}
}


/* ===== 兼容 projects.html 等页面所用变量别名 ===== */
:root{
  --brand:var(--blue);
  --brand-600:#3b53e0;
  --violet:var(--purple);
  --ink:var(--text);
  --ink-2:var(--text2);
  --slate:var(--text2);
  --line:var(--border);
  --grad-brand:linear-gradient(120deg,#4f6bff 0%,#8b5cf6 50%,#5fe2f4 100%);
  --grad-warm:linear-gradient(120deg,#ff8a25,#ffbe54);
  --grad-card:linear-gradient(160deg,#4f6bff 0%,#8b5cf6 100%);
  --amber:#ff8a25; --amber2:#ffbe54;
  --c-高并发:#ef5350; --c-实时:#06b6d4; --c-数据:#3b82f6; --c-平台:#8b5cf6;
  --c-O2O:#10b981; --c-物联:#14b8a6; --c-内容:#ec4899; --c-行业:#f59e0b;
}


/* ============================================================
   统一覆盖层：导航字号一致 + 大气增强
   （置于末尾，确保覆盖 index 内联与 dark-theme 的任何差异）
   ============================================================ */
.header{height:auto}
.nav{height:80px}
.brand img{height:42px}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-family:var(--font-body);font-size:16px;font-weight:500;letter-spacing:.02em;color:var(--text2);padding:6px 0;transition:color .2s;position:relative}
.nav-links a:hover{color:var(--text)}
.nav-links a.is-active{color:var(--text);font-weight:600}
.nav-links a.is-active::after,.nav-links a:hover::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:2px;background:var(--grad);border-radius:2px}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-btn{padding:11px 26px;border-radius:12px;font-size:15px;font-weight:600;letter-spacing:.03em;background:var(--grad);color:#fff;transition:all .25s;white-space:nowrap;box-shadow:0 4px 16px rgba(79,124,255,.25)}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 8px 28px rgba(79,124,255,.45)}
.drawer__panel a{padding:12px 16px;border-radius:10px;font-size:16px;color:var(--text2);transition:.2s}
/* 大气：更舒展的容器、标题与区块留白 */
.section{padding:clamp(76px,9vw,120px) 0;position:relative;z-index:1}
.section-head{max-width:760px;margin:0 auto clamp(48px,6vw,72px);text-align:center}
.eyebrow{font-size:14px}
.section-title{font-family:var(--font-display);font-size:clamp(2rem,4.4vw,3.4rem);font-weight:800;letter-spacing:-.02em;margin-bottom:14px}
.section-sub{font-size:18px;color:var(--text2);line-height:1.75}
.hero h1{font-size:clamp(2.6rem,5.6vw,4.4rem);font-weight:800;line-height:1.1;letter-spacing:-.02em;margin-bottom:22px}
.hero__tip{font-size:19px}
.btn{font-size:16px}
.btn--lg{font-size:17px}
/* 页脚字号统一 */
.footer__col a{font-size:15px}
.footer__brand p{font-size:15px}