/* ===== 深圳瑞辰教育 · 品牌首页（电影制片厂风） ===== */
@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Outfit:wght@400;500;600;700&display=swap');
:root{
  --bg: #0a0b0e;
  --bg-2: #101218;
  --surface: rgba(244,239,230,.04);
  --surface-2: rgba(244,239,230,.07);
  --border: rgba(244,239,230,.09);
  --border-strong: rgba(244,239,230,.16);
  --text: #f4efe6;
  --muted: #9b9488;
  --amber: #e8a84a;
  --amber-bright: #f0c879;
  --amber-dim: #b87d2a;
  --grad: linear-gradient(120deg,#f0c879 0%,#e8a84a 45%,#b87d2a 110%);
  --grad-soft: linear-gradient(120deg,rgba(232,168,74,.2),rgba(184,125,42,.12));
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Outfit","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text); background:var(--bg); line-height:1.65; -webkit-font-smoothing:antialiased;
  overflow-x:hidden; position:relative;
}
a{text-decoration:none;color:inherit}

/* ---------- 背景层 ---------- */
.bg-grid{position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:54px 54px;
  -webkit-mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000,transparent 75%);
          mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000,transparent 75%);}
.bg-orb{position:fixed;border-radius:50%;filter:blur(110px);opacity:.5;z-index:0;pointer-events:none}
.bg-orb--1{width:520px;height:520px;background:#e8a84a;top:-180px;left:-120px;opacity:.28}
.bg-orb--2{width:560px;height:560px;background:#8a5a20;top:120px;right:-180px;opacity:.32}
.bg-orb--3{width:460px;height:460px;background:#3a2a14;bottom:-200px;left:40%;opacity:.4}

/* ---------- 顶部导航 ---------- */
.home-nav{position:sticky;top:0;z-index:50;backdrop-filter:blur(16px);
  background:rgba(8,7,13,.6);border-bottom:1px solid var(--border)}
.home-nav__inner{max-width:1200px;margin:0 auto;padding:14px 24px;display:flex;align-items:center;gap:24px}
.home-brand{display:flex;align-items:center;gap:12px;font-weight:700;font-size:18px}
.home-brand__logo{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:rgba(232,168,74,.12);border:1px solid rgba(232,168,74,.28)}
.home-brand__name{font-family:"Fraunces","Songti SC",serif;letter-spacing:-.02em}
.home-brand__name i{font-style:normal;font-family:"Outfit",sans-serif;font-weight:600;color:var(--amber-bright);margin-left:6px;font-size:14px}
.home-nav__links{margin-left:auto;display:flex;gap:28px}
.home-nav__links a{color:var(--muted);font-size:15px;transition:.15s}
.home-nav__links a:hover{color:#fff}
.home-nav__login{background:var(--grad);color:#1a1208;padding:9px 20px;border-radius:10px;
  font-size:14px;font-weight:700;transition:.18s;box-shadow:0 8px 24px rgba(232,168,74,.28)}
.home-nav__login:hover{transform:translateY(-1px);box-shadow:0 12px 30px rgba(232,168,74,.42)}

/* ---------- 英雄区 ---------- */
.hero{position:relative;z-index:1;padding:96px 24px 76px}
.hero__inner{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:1.05fr .95fr;
  gap:56px;align-items:center}
.hero__eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:999px;
  font-size:13px;letter-spacing:.5px;background:var(--surface-2);border:1px solid var(--border-strong);
  color:var(--amber-bright);margin-bottom:26px;backdrop-filter:blur(6px)}
.hero__title{font-family:"Fraunces","Songti SC",serif;font-size:clamp(38px,5.2vw,62px);line-height:1.12;font-weight:700;letter-spacing:-.02em}
.hero__title .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__sub{max-width:560px;margin:22px 0 36px;font-size:clamp(15px,1.6vw,17px);line-height:1.85;color:var(--muted)}
.hero__cta{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{background:var(--grad);color:#1a1208;padding:15px 36px;border-radius:12px;font-size:16px;
  font-weight:700;box-shadow:0 14px 34px rgba(232,168,74,.32);transition:.18s}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 44px rgba(232,168,74,.45)}
.btn-primary--lg{padding:17px 44px;font-size:17px}
.btn-ghost{background:var(--surface);color:#fff;border:1px solid var(--border-strong);
  padding:15px 32px;border-radius:12px;font-size:16px;font-weight:600;transition:.18s}
.btn-ghost:hover{background:var(--surface-2);border-color:var(--amber)}
.hero__stats{display:flex;gap:14px;flex-wrap:wrap;margin-top:50px}
.hero__stat{background:var(--surface);border:1px solid var(--border);border-radius:14px;
  padding:15px 24px;min-width:118px;backdrop-filter:blur(8px)}
.hero__stat b{display:block;font-size:21px;font-weight:800;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero__stat span{font-size:13px;color:var(--muted)}

/* ---------- 产品 mockup ---------- */
.hero__visual{position:relative}
.mock{position:relative;z-index:2;background:linear-gradient(160deg,rgba(255,255,255,.07),rgba(255,255,255,.02));
  border:1px solid var(--border-strong);border-radius:20px;padding:14px;
  box-shadow:0 30px 80px rgba(0,0,0,.55),inset 0 1px 0 rgba(255,255,255,.08);backdrop-filter:blur(14px)}
.mock__bar{display:flex;align-items:center;gap:7px;padding:2px 4px 12px}
.mock__bar .dot{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.22)}
.mock__bar .dot:first-child{background:#ff5f57}
.mock__bar .dot:nth-child(2){background:#febc2e}
.mock__bar .dot:nth-child(3){background:#28c840}
.mock__title{margin-left:10px;font-size:13px;color:var(--muted);font-weight:600}
.mock__preview{position:relative;aspect-ratio:9/14;border-radius:14px;overflow:hidden;
  background:radial-gradient(120% 90% at 30% 20%,#5a3a18,#1a1208 70%),var(--grad-soft);
  display:grid;place-items:center;border:1px solid var(--border)}
.mock__play{width:58px;height:58px;border-radius:50%;background:rgba(255,255,255,.92);color:#1a1208;
  display:grid;place-items:center;font-size:22px;padding-left:4px;box-shadow:0 10px 30px rgba(0,0,0,.4)}
.mock__badge{position:absolute;bottom:10px;left:10px;font-size:11px;padding:4px 10px;border-radius:8px;
  background:rgba(0,0,0,.45);color:#fff;border:1px solid var(--border-strong)}
.mock__clips{display:flex;gap:5px;margin-top:12px}
.clip{flex:1;height:26px;border-radius:6px;opacity:.9}
.clip--v{background:linear-gradient(135deg,#e8a84a,#b87d2a)}
.clip--i{background:linear-gradient(135deg,#f0c879,#e8a84a)}
.clip--c{background:linear-gradient(135deg,#c4892e,#6bcb8a)}
.mock__wave{display:flex;align-items:flex-end;gap:3px;height:34px;margin-top:12px;
  padding:0 2px}
.mock__wave i{flex:1;background:linear-gradient(180deg,var(--amber-bright),var(--amber-dim));
  border-radius:2px;opacity:.85;animation:wave 1.1s ease-in-out infinite}
.mock__wave i:nth-child(2n){animation-delay:.15s;height:60%}
.mock__wave i:nth-child(3n){animation-delay:.3s;height:80%}
.mock__wave i:nth-child(4n){animation-delay:.45s;height:45%}
.mock__wave i:nth-child(5n){animation-delay:.6s;height:70%}
@keyframes wave{0%,100%{transform:scaleY(.4)}50%{transform:scaleY(1)}}
.mock-float{position:absolute;z-index:3;background:rgba(13,11,21,.82);border:1px solid var(--border-strong);
  border-radius:12px;padding:10px 14px;font-size:13px;font-weight:600;color:#fff;
  box-shadow:0 14px 34px rgba(0,0,0,.5);backdrop-filter:blur(10px)}
.mock-float--1{top:18%;right:-26px;animation:float 4.5s ease-in-out infinite}
.mock-float--2{bottom:14%;left:-26px;animation:float 4.5s ease-in-out infinite .8s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

/* ---------- 通用区块 ---------- */
.section{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:88px 24px}
.section--alt{background:linear-gradient(180deg,rgba(255,255,255,.025),rgba(255,255,255,0));
  max-width:none;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section--alt > *{max-width:1200px;margin-left:auto;margin-right:auto}
.section__head{text-align:center;margin-bottom:50px}
.section__tag{display:inline-block;padding:6px 16px;border-radius:999px;font-size:13px;font-weight:700;
  color:var(--amber-bright);background:rgba(232,168,74,.14);border:1px solid rgba(232,168,74,.3);margin-bottom:14px}
.section__head h2{font-family:"Fraunces","Songti SC",serif;font-size:clamp(26px,3.4vw,38px);font-weight:700;letter-spacing:-.02em}
.section__head p{color:var(--muted);margin-top:12px;font-size:16px}

/* ---------- 能力卡片 ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:28px 24px;
  transition:.22s;position:relative;overflow:hidden}
.feature-card::before{content:"";position:absolute;left:0;top:0;height:3px;width:100%;
  background:var(--grad);transform:scaleX(0);transform-origin:left;transition:.25s}
.feature-card:hover{transform:translateY(-6px);background:var(--surface-2);
  border-color:rgba(232,168,74,.4);box-shadow:0 22px 50px rgba(232,168,74,.18)}
.feature-card:hover::before{transform:scaleX(1)}
.feature-card__ic{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  background:linear-gradient(145deg,rgba(232,168,74,.2),rgba(232,168,74,.05));border:1px solid rgba(232,168,74,.28);
  color:var(--amber-bright);margin-bottom:16px}
.feature-card__ic svg{width:26px;height:26px}
.feature-card h3{font-size:19px;margin-bottom:8px}
.feature-card p{color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- 工作流 ---------- */
.flow{display:flex;align-items:stretch;justify-content:center;gap:8px;flex-wrap:wrap}
.flow__step{flex:1;min-width:180px;background:var(--surface);border:1px solid var(--border);border-radius:16px;
  padding:26px 20px;text-align:center;position:relative}
.flow__num{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;
  background:var(--grad);color:#1a1208;font-weight:800;font-size:18px;box-shadow:0 8px 20px rgba(232,168,74,.35)}
.flow__step h4{font-size:17px;margin-bottom:6px}
.flow__step p{color:var(--muted);font-size:13px}
.flow__arrow{display:grid;place-items:center;color:var(--amber-bright);font-size:26px;font-weight:800;padding:0 4px}

/* ---------- 产品演示 ---------- */
.showcase{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.showcase__item{background:var(--surface);border:1px solid var(--border);border-radius:18px;padding:30px 26px;
  transition:.22s}
.showcase__item:hover{transform:translateY(-5px);border-color:rgba(232,168,74,.4);box-shadow:0 20px 44px rgba(232,168,74,.18)}
.showcase__ic{width:48px;height:48px;border-radius:14px;display:grid;place-items:center;margin-bottom:14px;
  background:linear-gradient(145deg,rgba(232,168,74,.18),rgba(232,168,74,.05));border:1px solid rgba(232,168,74,.25);color:var(--amber-bright)}
.showcase__ic svg{width:22px;height:22px}
.showcase__item h4{font-size:18px;margin-bottom:8px}
.showcase__item p{color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- 为什么选我们 ---------- */
.why-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why-item{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:24px 22px}
.why-item b{display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;
  color:transparent;font-size:17px;margin-bottom:8px}
.why-item p{color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- CTA 横幅 ---------- */
.cta-band{position:relative;z-index:1;padding:80px 24px;text-align:center;
  background:
    radial-gradient(60% 120% at 50% 0%,rgba(232,168,74,.18),transparent 70%),
    linear-gradient(135deg,#0a0b0e,#16120c)}

.cta-band__inner{max-width:760px;margin:0 auto}
.cta-band h2{font-family:"Fraunces","Songti SC",serif;font-size:clamp(24px,3.4vw,36px);font-weight:700}
.cta-band p{margin:14px 0 30px;color:var(--muted);font-size:16px}

/* ---------- 页脚 ---------- */
.home-foot{position:relative;z-index:1;max-width:1200px;margin:0 auto;padding:40px 24px;
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  color:var(--muted);font-size:14px;border-top:1px solid var(--border)}
.home-foot__brand{font-weight:700;color:var(--text)}

@media (max-width:980px){
  .hero__inner{grid-template-columns:1fr;gap:48px}
  .hero__visual{max-width:460px;margin:0 auto;width:100%}
  .feature-grid,.why-grid{grid-template-columns:repeat(2,1fr)}
  .showcase{grid-template-columns:1fr}
  .home-nav__links{display:none}
}
@media (max-width:560px){
  .feature-grid,.why-grid{grid-template-columns:1fr}
  .flow{flex-direction:column}
  .flow__arrow{transform:rotate(90deg)}
}