/* ============================================================
   设计令牌 —— 与 academy.scorechina.com 保持一致
   ============================================================ */
:root{
  --brand:#2B6CB0;
  --brand-dark:#1F4E79;
  --brand-soft:#EAF2FA;
  --ink:#1f2937;
  --ink-2:#374151;
  --muted:#6b7280;
  --muted-2:#9ca3af;
  --line:#e5e7eb;
  --bg:#f5f7fa;
  --white:#fff;
  --footer:#1f2937;
  --gold:#C9A227;
  --radius:14px;
  --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --shadow:0 4px 12px rgba(16,24,40,.07),0 2px 4px rgba(16,24,40,.04);
  --shadow-lg:0 18px 40px -12px rgba(16,24,40,.18),0 8px 16px -8px rgba(16,24,40,.08);
  --maxw:1152px;
  --grad:linear-gradient(135deg,#2b6cb0 0%,#1f4e79 100%);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0;line-height:1.3;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(43,108,176,.45);outline-offset:2px;border-radius:6px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ============================ 顶部导航 ============================ */
.header{
  position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;transition:border-color .25s,box-shadow .25s;
}
.header.scrolled{border-bottom-color:var(--line);box-shadow:0 1px 12px rgba(16,24,40,.06)}
.header-in{display:flex;align-items:center;gap:18px;height:72px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand img{width:44px;height:44px;border-radius:50%;background:#fff;object-fit:contain;padding:2px;box-shadow:var(--shadow-sm)}
.brand-txt strong{display:block;font-size:16px;font-weight:700;line-height:1.25;color:var(--ink)}
.brand-txt span{display:block;font-size:11px;color:var(--muted-2);letter-spacing:.02em;line-height:1.4}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav a{font-size:14.5px;font-weight:500;color:var(--ink-2);padding:8px 13px;border-radius:9px;transition:background .18s,color .18s;white-space:nowrap}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.header-cta{display:flex;align-items:center;gap:10px;margin-left:6px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:inherit;font-size:15px;font-weight:600;line-height:1;
  padding:13px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;
  transition:transform .16s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 6px 16px -6px rgba(43,108,176,.55)}
.btn-primary:hover{background:#255d99;box-shadow:0 10px 22px -8px rgba(43,108,176,.6)}
.btn-white{background:#fff;color:var(--brand);box-shadow:0 8px 22px -10px rgba(0,0,0,.4)}
.btn-white:hover{background:#f2f7fc}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:#fff}
.btn-outline{background:#fff;color:var(--brand);border-color:#c9dcf0}
.btn-outline:hover{background:var(--brand-soft);border-color:var(--brand)}
.btn-sm{padding:10px 16px;font-size:14px;border-radius:9px}
.btn-lg{padding:16px 30px;font-size:16.5px;border-radius:12px}
.nav-toggle{display:none;margin-left:auto;background:#fff;border:1px solid var(--line);border-radius:10px;width:44px;height:44px;align-items:center;justify-content:center;cursor:pointer;color:var(--ink)}
.nav-toggle svg{width:22px;height:22px}

/* 移动端抽屉 */
.drawer{display:none;border-top:1px solid var(--line);background:#fff}
.drawer.open{display:block}
.drawer-in{padding:10px 24px 22px;display:flex;flex-direction:column;gap:2px}
.drawer-in a:not(.btn){padding:13px 4px;font-size:16px;font-weight:500;color:var(--ink-2);border-bottom:1px solid #f1f3f6}
.drawer-in .btn{margin-top:14px;border-bottom:0;color:#fff}

/* ============================ Hero ============================ */
.hero{position:relative;overflow:hidden;background:var(--grad);color:#fff;padding:76px 0 108px;text-align:center}
.hero::before{
  content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.16) 1px,transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(ellipse 75% 65% at 50% 32%,#000 20%,transparent 78%);
  mask-image:radial-gradient(ellipse 75% 65% at 50% 32%,#000 20%,transparent 78%);
}
.hero::after{
  content:"";position:absolute;width:720px;height:720px;right:-260px;top:-320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.14),transparent 62%);pointer-events:none;
}
.hero-in{position:relative;z-index:1}
.hero-logo{
  width:92px;height:92px;border-radius:50%;background:rgba(255,255,255,.96);object-fit:contain;
  padding:6px;margin:0 auto 22px;box-shadow:0 0 0 5px rgba(255,255,255,.22),0 18px 38px -14px rgba(0,0,0,.5);
}
.eyebrow{font-size:12.5px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:rgba(255,255,255,.72)}
.hero h1{font-size:clamp(30px,4.6vw,50px);font-weight:800;margin:16px 0 0;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:#fff;display:inline-block;position:relative}
.hero h1 em::after{
  content:"";position:absolute;left:50%;transform:translateX(-50%);bottom:-14px;width:64px;height:3px;border-radius:3px;
  background:linear-gradient(90deg,rgba(201,162,39,.15),rgba(201,162,39,.92),rgba(201,162,39,.15));
}
.hero-sub{max-width:660px;margin:34px auto 0;font-size:clamp(15px,1.6vw,18px);color:rgba(255,255,255,.9);line-height:1.75}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:36px}
.hero-note{margin-top:22px;font-size:13px;color:rgba(255,255,255,.68);display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.hero-note span{display:inline-flex;align-items:center;gap:6px}
.hero-note svg{width:15px;height:15px;opacity:.85}

/* ============================ 数据条 ============================ */
.stats{margin-top:-58px;position:relative;z-index:5}
.stats-card{
  background:#fff;border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);
  display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;border:1px solid rgba(229,231,235,.7);
}
.stat{padding:30px 26px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-size:clamp(26px,3vw,34px);font-weight:800;color:var(--brand);letter-spacing:-.02em;line-height:1.15}
.stat b small{font-size:.5em;font-weight:700;margin-left:2px}
.stat span{display:block;margin-top:7px;font-size:13.5px;color:var(--muted);line-height:1.55}

/* ============================ 通用区块 ============================ */
.section{padding:84px 0}
.section.alt{background:#fff}
.section-head{text-align:center;max-width:760px;margin:0 auto 52px}
.tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--brand);background:var(--brand-soft);padding:7px 14px;border-radius:999px;
}
.section-head h2{font-size:clamp(24px,3.2vw,34px);font-weight:800;margin-top:18px;letter-spacing:-.02em}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px;line-height:1.8}

/* ============================ 关于 SCORE ============================ */
.about-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:60px;align-items:start}
.about-copy h2{font-size:clamp(23px,2.8vw,31px);font-weight:800;margin-top:16px}
.about-copy p{color:var(--ink-2);margin-top:16px;font-size:15.6px;line-height:1.85}
.about-copy p.lead{font-size:16.5px;color:var(--ink)}
.about-copy strong{color:var(--brand-dark);font-weight:700}
.pillars{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:26px}
.pillar{background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px 16px}
.pillar b{display:block;font-size:14.5px;color:var(--ink)}
.pillar span{font-size:12.8px;color:var(--muted);line-height:1.5;display:block;margin-top:4px}

/* 流程时间线 */
.flow{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;box-shadow:var(--shadow)}
.flow h3{font-size:16.5px;font-weight:700;display:flex;align-items:center;gap:9px}
.flow h3 svg{width:19px;height:19px;color:var(--brand)}
.flow ol{margin-top:22px;position:relative}
.flow ol::before{content:"";position:absolute;left:15px;top:10px;bottom:14px;width:2px;background:linear-gradient(180deg,var(--brand),#cfe0f0)}
.flow li{position:relative;padding:0 0 22px 46px}
.flow li:last-child{padding-bottom:0}
.flow li::before{
  content:counter(step,decimal-leading-zero);counter-increment:step;
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:50%;background:#fff;
  border:2px solid var(--brand);color:var(--brand);font-size:11.5px;font-weight:800;
  display:flex;align-items:center;justify-content:center;letter-spacing:0;
}
.flow ol{counter-reset:step}
.flow li b{display:block;font-size:14.8px;color:var(--ink)}
.flow li span{display:block;font-size:13.4px;color:var(--muted);line-height:1.6;margin-top:3px}

/* ============================ 课程矩阵 ============================ */
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.course-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  display:flex;flex-direction:column;
}
.course-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#cfe0f0}
.course-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:#e8eef5}
.course-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.course-card:hover .course-thumb img{transform:scale(1.045)}
.course-badge{
  position:absolute;top:11px;left:11px;background:rgba(31,41,55,.82);color:#fff;
  font-size:11.5px;font-weight:700;padding:5px 10px;border-radius:7px;backdrop-filter:blur(4px);letter-spacing:.02em;
}
.course-body{padding:18px 19px 20px;display:flex;flex-direction:column;flex:1}
.course-body h3{font-size:16.5px;font-weight:700;letter-spacing:-.01em}
.course-body p{font-size:13.6px;color:var(--muted);line-height:1.68;margin-top:8px;flex:1}
.course-meta{display:flex;align-items:center;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid #f1f3f6}
.course-meta .lessons{font-size:12.8px;color:var(--muted-2);display:inline-flex;align-items:center;gap:5px}
.course-meta .lessons svg{width:14px;height:14px}
.course-meta .price{font-size:14px;font-weight:800;color:#c0392b}
.course-meta .price.free{color:#1a7f4b}

.course-foot{
  margin-top:34px;background:var(--brand-soft);border:1px solid #d7e6f5;border-radius:var(--radius);
  padding:22px 26px;display:flex;align-items:center;gap:20px;flex-wrap:wrap;
}
.course-foot p{flex:1;min-width:220px;font-size:14px;color:#28527a;line-height:1.7}
.course-foot p b{color:var(--brand-dark)}

/* ============================ 服务 ============================ */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.svc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:transform .2s,box-shadow .2s,border-color .2s}
.svc:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#cfe0f0}
.svc-ico{width:46px;height:46px;border-radius:12px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.svc-ico svg{width:23px;height:23px}
.svc h3{font-size:16px;font-weight:700}
/* 「会员专属」标记：提示该服务需会员权限，避免点进去才发现要访问码 */
.svc-pill{
  display:inline-block;vertical-align:2px;margin-left:6px;
  font-size:10.5px;font-weight:700;letter-spacing:.02em;line-height:1.5;
  color:#8a6414;background:#fdf3d7;border:1px solid #f0dfa8;
  padding:1px 7px;border-radius:999px;white-space:nowrap;
}
.svc p{font-size:13.6px;color:var(--muted);line-height:1.72;margin-top:9px}
.svc a{display:inline-flex;align-items:center;gap:5px;font-size:13.4px;font-weight:700;color:var(--brand);margin-top:13px}
.svc a svg{width:14px;height:14px;transition:transform .18s}
.svc a:hover svg{transform:translateX(3px)}

/* ============================ 成效 ============================ */
.impact{background:var(--grad);color:#fff;position:relative;overflow:hidden}
.impact::before{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.1) 1px,transparent 1px);background-size:28px 28px;opacity:.5;pointer-events:none}
.impact .wrap{position:relative;z-index:1}
.impact .section-head h2{color:#fff}
.impact .section-head p{color:rgba(255,255,255,.8)}
.impact .tag{background:rgba(255,255,255,.16);color:#fff}
.impact-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.imp{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);border-radius:13px;padding:22px 14px;text-align:center;backdrop-filter:blur(6px)}
.imp b{display:block;font-size:clamp(22px,2.6vw,30px);font-weight:800;letter-spacing:-.02em;line-height:1.15}
.imp span{display:block;margin-top:8px;font-size:12.6px;color:rgba(255,255,255,.82);line-height:1.5}
.impact-src{text-align:center;margin-top:30px;font-size:12.5px;color:rgba(255,255,255,.6)}

/* ============================ 联系 ============================ */
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow);
  padding:52px 48px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.contact-card h2{font-size:clamp(23px,2.8vw,30px);font-weight:800}
.contact-card p{color:var(--muted);margin-top:14px;font-size:15.4px;line-height:1.82}
.contact-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.contact-list{display:flex;flex-direction:column;gap:14px}
.contact-item{display:flex;align-items:center;gap:13px;background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:15px 17px}
.contact-item .ci{width:38px;height:38px;border-radius:10px;background:#fff;border:1px solid var(--line);color:var(--brand);display:flex;align-items:center;justify-content:center;flex:none}
.contact-item .ci svg{width:18px;height:18px}
.contact-item small{display:block;font-size:11.8px;color:var(--muted-2);letter-spacing:.03em}
.contact-item a,.contact-item b{font-size:14.4px;font-weight:700;color:var(--ink);word-break:break-all}
.contact-item a:hover{color:var(--brand)}

/* ============================ 页脚 ============================ */
.footer{background:var(--footer);color:var(--muted-2);padding:52px 0 30px;margin-top:0}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:44px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;gap:14px;align-items:flex-start}
.footer-brand img{width:60px;height:60px;border-radius:50%;background:#fff;padding:3px;object-fit:contain;flex:none}
.footer-brand strong{display:block;color:#fff;font-size:16px;font-weight:700}
.footer-brand span{display:block;color:#cbd5e1;font-size:13.4px;margin-top:3px}
.footer-brand p{font-size:12.8px;color:#8b95a3;line-height:1.75;margin-top:12px;max-width:330px}
.footer-col h4{color:#fff;font-size:13.4px;font-weight:700;letter-spacing:.04em;margin-bottom:14px}
.footer-col a{display:block;font-size:13.4px;color:#9ca3af;padding:6px 0;transition:color .18s}
.footer-col a:hover{color:#fff}
.footer-bot{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;font-size:12.6px;color:#7d8794}
.footer-bot .fb-left{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.footer-bot a:hover{color:#cbd5e1}
.footer-icp:empty{display:none}
.footer-icp a{color:#7d8794}
.footer-icp a:hover{color:#cbd5e1}

/* 回到顶部 */
.totop{
  position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:50%;background:#fff;color:var(--brand);
  border:1px solid var(--line);box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center;
  cursor:pointer;opacity:0;pointer-events:none;transform:translateY(10px);transition:.25s;z-index:50;
}
.totop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.totop svg{width:20px;height:20px}

/* 入场动画 */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.22,.61,.36,1),transform .6s cubic-bezier(.22,.61,.36,1)}
.reveal.in{opacity:1;transform:none}

/* ============================ 响应式 ============================ */
/* 桌面宽度一律收起抽屉（防止在移动端展开后旋转/放大到桌面时菜单悬留） */
@media(min-width:901px){
  .drawer{display:none!important}
}
@media(max-width:1080px){
  .about-grid{grid-template-columns:1fr;gap:40px}
  .svc-grid{grid-template-columns:repeat(2,1fr)}
  .impact-grid{grid-template-columns:repeat(3,1fr)}
  .contact-card{grid-template-columns:1fr;gap:34px;padding:40px 32px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:900px){
  .nav,.header-cta{display:none}
  .nav-toggle{display:flex}
  .course-grid{grid-template-columns:repeat(2,1fr)}
  .stats-card{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .hero{padding:56px 0 96px}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  .section{padding:60px 0}
  .course-grid{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:1fr}
  .impact-grid{grid-template-columns:repeat(2,1fr)}
  .pillars{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .hero-note{gap:10px;flex-direction:column;align-items:center}
  .footer-top{grid-template-columns:1fr}
  .footer-bot{flex-direction:column;align-items:flex-start;gap:10px}
  .contact-card{padding:30px 22px}
  .stats{margin-top:-40px}
  .stat{padding:22px 14px}
  .brand-txt span{display:none}
  .course-foot{padding:18px 20px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn:hover,.course-card:hover,.svc:hover{transform:none}
}

/* ============================ 语言切换 ============================ */
.lang{
  display:inline-flex;align-items:center;gap:2px;
  background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px;
}
.lang a{
  font-size:13px;font-weight:600;line-height:1.2;color:var(--muted);
  padding:5px 11px;border-radius:999px;transition:background .18s,color .18s;white-space:nowrap;
}
.lang a:hover{color:var(--brand);background:var(--brand-soft)}
.lang a.is-on{background:var(--brand);color:#fff}
.lang a.is-on:hover{background:var(--brand-dark);color:#fff}
.drawer-in .lang{margin-top:14px;align-self:flex-start}
/* 窄屏头部空间紧张：语言切换收进抽屉（<=900px 时 .header-cta 本就整体隐藏） */
@media (max-width:1023px){ .header-cta .lang{display:none} }

/* 窄屏头部：英文站名（Institute for Sustainable Enterprise）比中文长得多，
   不约束会把汉堡按钮顶出视口（实测 390px 下溢出 4px），改为省略号截断 */
.brand,.brand-txt,.header-in{min-width:0}
.brand-txt strong,.brand-txt span{
  display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
@media (max-width:640px){
  .brand-txt span{display:none}
  .header-in{gap:12px}
}