/* ===== 芸曦美官网 · 全局样式 ===== */
:root{
  --ink:#2D1B4E;
  --ink-soft:#6B6580;
  --purple:#9B6BC4;
  --purple-deep:#7B4FB0;
  --pink:#E8739A;
  --gold:#C9A24B;
  --bg:#FFFFFF;
  --bg-soft:#F7F4FB;
  --bg-pink:#FBF2F6;
  --line:#ECE7F3;
  --grad:linear-gradient(120deg,#9B6BC4 0%,#E8739A 100%);
  --grad-soft:linear-gradient(120deg,#F3ECFB 0%,#FCEEF4 100%);
  --shadow:0 18px 50px rgba(45,27,78,.10);
  --shadow-sm:0 8px 24px rgba(45,27,78,.08);
  --radius:20px;
  --maxw:1180px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{text-decoration:none;color:inherit}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,opacity .2s ease;border:1px solid transparent;white-space:nowrap}
.btn-lg{padding:16px 34px;font-size:16px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 26px rgba(232,115,154,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(232,115,154,.42)}
.btn-ghost{background:rgba(255,255,255,.7);color:var(--ink);border-color:var(--line);backdrop-filter:blur(6px)}
.btn-ghost:hover{transform:translateY(-2px);box-shadow:var(--shadow-sm)}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:all .3s ease}
.nav.scrolled{background:rgba(255,255,255,.82);backdrop-filter:blur(14px);box-shadow:0 4px 24px rgba(45,27,78,.07)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:20px;letter-spacing:1px}
.brand-logo{width:38px;height:38px;border-radius:11px;object-fit:cover;box-shadow:var(--shadow-sm)}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links>a:not(.nav-cta){color:var(--ink);font-size:15px;font-weight:500;position:relative;padding:4px 0}
.nav-links>a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--grad);transition:width .25s ease}
.nav-links>a:not(.nav-cta):hover::after{width:100%}
.nav-cta{padding:10px 22px;font-size:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;padding:140px 0 90px;background:var(--grad-soft);overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.blob{position:absolute;border-radius:50%;filter:blur(60px);opacity:.5}
.blob-1{width:420px;height:420px;background:#E9D5F5;top:-120px;right:-80px}
.blob-2{width:360px;height:360px;background:#FBD5E2;bottom:-140px;left:-100px}
.blob-3{width:260px;height:260px;background:#F3E6C9;top:40%;left:45%}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:2px;color:var(--purple-deep);
  text-transform:uppercase;margin-bottom:16px;padding:6px 14px;border-radius:999px;background:rgba(155,107,196,.12)}
.hero h1{font-size:clamp(34px,5vw,58px);line-height:1.15;font-weight:800;letter-spacing:1px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{margin:22px 0 32px;font-size:17px;color:var(--ink-soft);max-width:520px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:46px}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats strong{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13px;color:var(--ink-soft);margin-top:2px}

/* Hero 手机样机 */
.hero-phone{display:flex;justify-content:center}
.phone{position:relative;width:260px;height:530px;background:#1c1430;border-radius:42px;padding:12px;
  box-shadow:0 30px 70px rgba(45,27,78,.35);border:1px solid rgba(255,255,255,.08)}
.phone-notch{position:absolute;top:14px;left:50%;transform:translateX(-50%);width:110px;height:22px;background:#1c1430;border-radius:0 0 16px 16px;z-index:3}
.phone-screen{width:100%;height:100%;background:linear-gradient(170deg,#FBF2F6,#F3ECFB);border-radius:32px;overflow:hidden;display:flex;flex-direction:column}
.app-bar{display:flex;align-items:center;gap:8px;padding:34px 18px 12px;font-weight:800;font-size:18px;color:var(--ink)}
.app-bar img{width:26px;height:26px;border-radius:8px}
.app-banner{margin:6px 16px 12px;padding:16px;border-radius:16px;background:var(--grad);color:#fff;font-weight:700;font-size:15px;box-shadow:var(--shadow-sm)}
.app-list{padding:0 16px;display:flex;flex-direction:column;gap:10px}
.app-item{display:flex;align-items:center;gap:10px;background:#fff;border-radius:14px;padding:14px;font-size:14px;font-weight:600;color:var(--ink);box-shadow:0 4px 14px rgba(45,27,78,.05)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--purple)}

/* ===== 通用区块 ===== */
.section{padding:96px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:.5px}
.section-sub{margin-top:14px;color:var(--ink-soft);font-size:16px}
.app-section{background:var(--bg-soft)}
.about-section{background:var(--grad-soft)}

/* ===== 课程网格 ===== */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.course-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease;display:flex;flex-direction:column}
.course-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.course-cover{position:relative;aspect-ratio:1280/549;background:var(--grad-soft);overflow:hidden}
.course-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.course-card:hover .course-cover img{transform:scale(1.06)}
.course-tag{position:absolute;top:12px;left:12px;background:rgba(45,27,78,.78);color:#fff;font-size:12px;font-weight:600;padding:5px 12px;border-radius:999px;backdrop-filter:blur(4px)}
.course-body{padding:20px 20px 24px;display:flex;flex-direction:column;flex:1}
.course-body h3{font-size:18px;font-weight:700;line-height:1.4}
.course-sub{margin:8px 0 14px;color:var(--purple-deep);font-size:14px;font-weight:600}
.course-desc{color:var(--ink-soft);font-size:13.5px;flex:1}
.course-link{margin-top:16px;display:inline-flex;align-items:center;gap:6px;color:var(--pink);font-weight:700;font-size:14px}
.course-link::after{content:"→";transition:transform .2s ease}
.course-card:hover .course-link::after{transform:translateX(4px)}

/* ===== APP 下载 ===== */
.app-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}
.feature-list{list-style:none;margin:28px 0 34px;display:flex;flex-direction:column;gap:14px}
.feature-list li{display:flex;align-items:center;gap:12px;font-size:16px;color:var(--ink)}
.fi{flex:none;width:24px;height:24px;border-radius:50%;background:var(--grad);color:#fff;font-size:13px;display:flex;align-items:center;justify-content:center;font-weight:700}
.app-actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.app-hint{font-size:13px;color:var(--ink-soft)}
.app-qr{display:flex;justify-content:center}
.qr-card{background:#fff;border-radius:24px;padding:26px;box-shadow:var(--shadow);text-align:center}
.qr-card img{width:200px;height:200px;margin:0 auto}
.qr-card p{margin-top:14px;font-size:14px;color:var(--ink-soft);line-height:1.5}

/* ===== 关于 ===== */
.about-inner{display:grid;grid-template-columns:.8fr 1.2fr;gap:48px;align-items:center}
.about-logo img{width:130px;height:130px;border-radius:28px;margin:0 auto;box-shadow:var(--shadow)}
.about-text h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin:10px 0 16px}
.about-text p{color:var(--ink-soft);font-size:16px;max-width:560px}

/* ===== 页脚 ===== */
.footer{background:var(--ink);color:#fff;padding:46px 0}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:700;letter-spacing:1px}
.footer-brand img{width:36px;height:36px;border-radius:10px}
.footer-links{display:flex;gap:26px}
.footer-links a{color:rgba(255,255,255,.8);font-size:14px;transition:color .2s}
.footer-links a:hover{color:#fff}
.copyright{color:rgba(255,255,255,.55);font-size:13px}
.beian{margin-top:4px}
.beian a{color:rgba(255,255,255,.45);font-size:12px;letter-spacing:.5px;transition:color .2s}
.beian a:hover{color:var(--gold)}

/* ===== 痛点共鸣 ===== */
.pain-section{background:var(--bg-soft)}
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;position:relative;transition:transform .25s ease,box-shadow .25s ease}
.pain-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-sm)}
.pain-no{position:absolute;top:22px;right:26px;font-size:34px;font-weight:800;color:var(--line);font-style:italic}
.pain-card h3{font-size:18px;font-weight:700;line-height:1.45;margin-bottom:10px;padding-right:46px}
.pain-card p{color:var(--ink-soft);font-size:14.5px;line-height:1.7}

/* ===== 为什么选芸曦美 ===== */
.trust-section{background:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.trust-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease}
.trust-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-sm)}
.trust-icon{width:54px;height:54px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700;margin-bottom:18px;box-shadow:0 8px 20px rgba(155,107,196,.3)}
.trust-card h3{font-size:16.5px;font-weight:700;line-height:1.45;margin-bottom:10px}
.trust-card p{color:var(--ink-soft);font-size:14px;line-height:1.7}

/* ===== 安心保障 ===== */
.safe-section{background:var(--grad-soft)}
.safe-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.safe-card{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow-sm)}
.safe-check{flex:none;width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;font-size:16px;display:flex;align-items:center;justify-content:center;font-weight:700}
.safe-card h3{font-size:16px;font-weight:700;margin-bottom:6px}
.safe-card p{color:var(--ink-soft);font-size:14px;line-height:1.65}

/* ===== 学摄影的收获 ===== */
.gain-section{background:#fff}
.gain-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.gain-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease}
.gain-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-sm)}
.gain-icon{width:54px;height:54px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:700;margin-bottom:18px;box-shadow:0 8px 20px rgba(155,107,196,.3)}
.gain-card h3{font-size:17px;font-weight:700;line-height:1.45;margin-bottom:10px}
.gain-card p{color:var(--ink-soft);font-size:14px;line-height:1.7}
.course-loading{text-align:center;color:var(--ink-soft);padding:40px;font-size:15px}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:40px;text-align:center}
  .hero-text{display:flex;flex-direction:column;align-items:center}
  .lead{margin-left:auto;margin-right:auto}
  .hero-actions,.hero-stats{justify-content:center}
  .hero-stats strong{font-size:20px}
  .hero-phone{order:-1}
  .gain-grid{grid-template-columns:repeat(2,1fr)}
  .course-grid{grid-template-columns:repeat(2,1fr)}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
  .app-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .feature-list{max-width:420px;margin-left:auto;margin-right:auto}
  .app-actions{justify-content:center}
  .about-inner{grid-template-columns:1fr;text-align:center}
}
@media (max-width:680px){
  .nav-links{position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:10px 24px 24px;box-shadow:0 16px 30px rgba(45,27,78,.12);transform:translateY(-130%);transition:transform .3s ease}
  .nav-links.open{transform:none}
  .nav-links>a:not(.nav-cta){width:100%;padding:14px 0;border-bottom:1px solid var(--line)}
  .nav-links .nav-cta{margin-top:14px;width:100%}
  .nav-toggle{display:flex}
  .section{padding:68px 0}
  .hero{padding:120px 0 70px}
  .hero-stats{gap:16px}
  .hero-stats strong{font-size:17px}
  .course-grid{grid-template-columns:1fr}
  .gain-grid{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr}
  .pain-grid{grid-template-columns:1fr}
  .safe-grid{grid-template-columns:1fr}
  .container{padding:0 18px}
}