/* 向阳学院品牌官网 v8.64 —— 零依赖、响应式、系统字体栈，首屏秒开 */
:root{
  --orange:#FC6C3C; --gold:#F8A83C; --dark:#17342A; --ink:#1f2a26;
  --gray:#5d6b66; --line:#e8ecea; --bg:#fff; --bg2:#f6f8f7;
  --grad:linear-gradient(135deg,#FC6C3C,#F8A83C);
  --radius:16px; --shadow:0 10px 34px rgba(23,52,42,.10);
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;
  font-weight:600;cursor:pointer;border:1.5px solid transparent;text-align:center;transition:transform .12s,box-shadow .12s,background .12s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(252,108,60,.32)}
.btn-primary:hover{box-shadow:0 10px 26px rgba(252,108,60,.42)}
.btn-ghost{background:#fff;color:var(--dark);border-color:#d9dfdc}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn-ghost.disabled{opacity:.55;pointer-events:none;background:#f2f4f3;color:#9aa5a0;border-color:#e4e8e6}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-sm{padding:9px 18px;font-size:14px}

/* Logo（v8.65 起默认使用品牌 Logo 图；后台未自定义时显示 /site/logo.jpeg） */
.logo{width:38px;height:38px;border-radius:11px;background:#fff;position:relative;flex:none;
  border:1px solid rgba(23,52,42,.08);box-shadow:0 4px 14px rgba(252,108,60,.18);overflow:hidden}
.logo::before{content:"";position:absolute;inset:0;border-radius:11px;
  background:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 200 200'><g fill='%23FC6C3C'><path d='M46 158 A54 54 0 0 1 154 158 L126 158 A26 26 0 0 0 74 158 Z' opacity='.85'/><rect x='89' y='49' width='22' height='46' rx='11'/><rect x='89' y='49' width='22' height='46' rx='11' transform='rotate(33 100 158)'/><rect x='89' y='49' width='22' height='46' rx='11' transform='rotate(62 100 158)'/><rect x='89' y='49' width='22' height='46' rx='11' transform='rotate(-33 100 158)'/><rect x='89' y='49' width='22' height='46' rx='11' transform='rotate(-62 100 158)'/></g></svg>") center/68% no-repeat}
.logo img{width:100%;height:100%;border-radius:11px;object-fit:contain;display:block;position:relative;z-index:1}
.logo-sm{width:30px;height:30px;border-radius:9px}

/* 顶栏 */
.topbar{position:fixed;top:0;left:0;right:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid rgba(232,236,234,.7)}
.topbar-in{height:60px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;margin-right:auto}
.brand-name{font-size:18px;font-weight:800;color:var(--dark)}
.topnav{display:flex;gap:26px;font-size:15px;color:var(--gray)}
.topnav a:hover{color:var(--orange)}

/* 首屏 */
.hero{padding:120px 0 70px;background:
  radial-gradient(900px 420px at 85% -10%,rgba(248,168,60,.16),transparent 60%),
  radial-gradient(700px 400px at 0% 0%,rgba(252,108,60,.10),transparent 55%);}
.hero-in{display:flex;align-items:center;gap:50px}
.hero-txt{flex:1;min-width:0}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.22;color:var(--dark);font-weight:800;letter-spacing:.5px}
.hero-intro{margin:18px 0 30px;font-size:17px;color:var(--gray);max-width:520px}
.dl-row{display:flex;gap:14px;flex-wrap:wrap}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stat b{display:block;font-size:26px;color:var(--dark);font-weight:800}
.stat span{font-size:13px;color:#8b9691}
.hero-visual{flex:0 0 340px;display:flex;justify-content:center}
.phone{width:272px;height:556px;border-radius:42px;background:linear-gradient(160deg,#203d33,#0e241d);
  padding:12px;box-shadow:0 30px 70px rgba(23,52,42,.28),0 0 0 2px rgba(255,255,255,.5) inset}
.phone-screen{width:100%;height:100%;border-radius:32px;overflow:hidden;background:#eef2f0;
  background-size:cover;background-position:center;display:flex;align-items:center;justify-content:center}

/* 分区通用 */
.section{padding:76px 0}
.section-gray{background:var(--bg2)}
.section-dark{background:linear-gradient(160deg,#17342A,#102820)}
.sec-title{text-align:center;font-size:clamp(24px,3vw,32px);color:var(--dark);font-weight:800}
.section-dark .sec-title{color:#fff}
.sec-sub{text-align:center;color:#8b9691;margin:10px 0 44px;font-size:15px}

/* 功能卡片 */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;
  text-align:center;transition:transform .15s,box-shadow .15s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feature-ico{font-size:38px;line-height:1;margin-bottom:14px}
.feature h4{font-size:17px;color:var(--dark);margin-bottom:8px}
.feature p{font-size:14px;color:var(--gray)}

/* 内容预览 */
.tabs{display:flex;justify-content:center;gap:10px;margin-bottom:34px}
.tab{padding:9px 26px;border-radius:999px;border:1.5px solid #d9dfdc;background:#fff;font-size:15px;
  color:var(--gray);cursor:pointer;font-weight:600}
.tab.on{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(252,108,60,.3)}
.art-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.art{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);cursor:pointer;
  transition:transform .15s,box-shadow .15s}
.art:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.art-cover-box{height:168px;background:linear-gradient(135deg,#ffe9dd,#fff3df);background-size:cover;background-position:center;position:relative}
.art-tag{position:absolute;left:10px;top:10px;background:rgba(23,52,42,.72);color:#fff;font-size:11px;
  padding:3px 10px;border-radius:999px}
.art-info{padding:16px 18px 18px}
.art-info h4{font-size:16px;color:var(--dark);line-height:1.45;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.art-info .art-more{margin-top:10px;font-size:13px;color:var(--orange);font-weight:600}

/* 截图墙 */
.shot-row{display:flex;gap:20px;overflow-x:auto;padding:6px 2px 18px;scroll-snap-type:x mandatory}
.shot-row::-webkit-scrollbar{height:8px}
.shot-row::-webkit-scrollbar-thumb{background:#d6dcd9;border-radius:8px}
.shot{flex:0 0 230px;border-radius:20px;overflow:hidden;box-shadow:var(--shadow);cursor:zoom-in;
  scroll-snap-align:start;border:1px solid var(--line)}
.shot img{width:100%;height:auto;display:block;background:#f4f6f5}

/* 联系区 */
.contact-in{display:grid;grid-template-columns:340px 1fr;gap:26px;align-items:start}
.kefu-card,.biz-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);
  border-radius:20px;padding:32px;text-align:center}
.kefu-card h3,.biz-card h3{color:#fff;font-size:20px;margin-bottom:8px}
.kefu-tip{color:#aab8b2;font-size:14px;margin-bottom:20px}
.qr-box{width:210px;height:210px;margin:0 auto;background:#fff;border-radius:14px;overflow:hidden;
  display:flex;align-items:center;justify-content:center;cursor:zoom-in}
.qr-box img{width:100%;height:100%;object-fit:contain}
.qr-empty{color:#93a09b;font-size:13px;line-height:1.9}
.biz-card{text-align:left}
.biz-desc{color:#aab8b2;font-size:14px;margin-bottom:20px}
.msg-form{display:flex;flex-direction:column;gap:12px}
.form-row{display:flex;gap:12px}
.inp{width:100%;padding:12px 14px;border-radius:10px;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.1);color:#fff;font-size:15px;font-family:inherit;outline:none}
.inp::placeholder{color:#8fa099}
.inp:focus{border-color:var(--gold);background:rgba(255,255,255,.14)}
select.inp option{color:#222}
textarea.inp{resize:vertical;min-height:96px}
.form-msg{font-size:13px;min-height:20px;color:#ffd9c7}
.form-msg.ok{color:#9be8c4}

/* 页脚 */
.footer{background:#0c211b;padding:34px 0 110px;color:#8fa099}
.footer-in{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700}
.footer-links{display:flex;gap:18px;font-size:13px}
.footer-links a:hover{color:#fff}
.footer-copy{margin-left:auto;font-size:13px}

/* 移动端底部下载条 */
.mobile-dlbar{position:fixed;left:0;right:0;bottom:0;z-index:40;display:none;align-items:center;gap:12px;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(255,255,255,.96);
  border-top:1px solid var(--line);backdrop-filter:blur(10px)}
.mbar-name{font-weight:700;color:var(--dark);font-size:15px;margin-right:auto}

/* 弹层 */
.modal{display:none;position:fixed;inset:0;z-index:100}
.modal.show{display:block}
.modal-mask{position:absolute;inset:0;background:rgba(10,24,20,.58)}
.modal-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:#fff;border-radius:20px;max-width:680px;width:calc(100% - 32px);max-height:88vh;overflow:hidden}
.modal-x{position:absolute;right:12px;top:8px;z-index:5;width:38px;height:38px;border-radius:50%;
  border:none;background:rgba(0,0,0,.34);color:#fff;font-size:22px;cursor:pointer;line-height:1}
.art-panel{display:flex;flex-direction:column}
.art-cover{height:230px;background:linear-gradient(135deg,#ffe9dd,#fff3df);background-size:cover;background-position:center;flex:none}
.art-body{padding:26px 30px 30px;overflow-y:auto}
.art-cat{font-size:12px;color:var(--orange);font-weight:700;margin-bottom:6px}
.art-body h3{font-size:21px;color:var(--dark);margin-bottom:14px}
.art-text{font-size:15.5px;color:#3a4742;white-space:pre-wrap;max-height:34vh;overflow:hidden}
.art-lock{position:relative;margin-top:6px}
.lock-mask{height:120px;margin-top:-120px;position:relative;z-index:2;
  background:linear-gradient(to bottom,rgba(255,255,255,0),#fff 78%);pointer-events:none}
.lock-cta{position:relative;z-index:3;text-align:center;padding:8px 0 4px}
.lock-t{font-size:15px;font-weight:700;color:var(--dark);margin-bottom:14px}
.lock-btns{display:flex;gap:12px;justify-content:center}

/* 灯箱 */
.lightbox-img{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  max-width:94vw;max-height:90vh;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.5)}

/* 微信引导 */
.wx-guide-card{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  background:#fff;border-radius:16px;width:300px;padding:26px 22px;text-align:center}
.wx-arrow{font-size:34px;text-align:right;color:var(--orange);margin-bottom:6px}
.wx-guide-t{font-size:17px;font-weight:800;color:var(--dark);margin-bottom:14px}
.wx-guide-s{background:#f6f8f7;border-radius:10px;padding:12px 14px;font-size:14px;
  color:#444;line-height:2;text-align:left;margin-bottom:12px}
.wx-guide-tip{font-size:12px;color:#999;margin-bottom:16px}

/* ===== 响应式：平板 ===== */
@media (max-width:900px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .art-grid{grid-template-columns:repeat(2,1fr)}
  .contact-in{grid-template-columns:1fr}
  .hero-visual{flex-basis:280px}
}
/* ===== 响应式：手机 ===== */
@media (max-width:680px){
  .topnav{display:none}
  .top-dl{padding:8px 14px;font-size:13px}
  .hero{padding:96px 0 50px}
  .hero-in{flex-direction:column-reverse;gap:34px;text-align:center}
  .hero-intro{margin-left:auto;margin-right:auto}
  .dl-row{justify-content:center}
  .stats{justify-content:center;gap:24px}
  .hero-visual{flex-basis:auto}
  .phone{width:236px;height:482px;border-radius:36px}
  .section{padding:56px 0}
  .feature-grid{grid-template-columns:1fr 1fr;gap:12px}
  .feature{padding:22px 14px}
  .feature-ico{font-size:32px}
  .art-grid{grid-template-columns:1fr}
  .form-row{flex-direction:column}
  .footer{padding-bottom:90px}
  .footer-copy{margin-left:0;width:100%}
  .mobile-dlbar{display:flex}
  .art-body{padding:22px 20px 24px}
  .lock-btns{flex-direction:column}
  .lock-btns .btn{width:100%}
}