/* ==========================================================================
   来荷新能源 · 官方网站 · 设计令牌 + 组件库
   依据：《来荷官网设计规范 V2.0》（仅参考 qualcomm.com）
   品牌主色 #061EA0（硬约束） · QCOM 红 #E60012 仅暗色 Hero 点睛
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  /* 颜色 */
  --brand:#061ea0;            /* 品牌主色 深蓝（硬约束） */
  --brand-hover:#0a1c8a;
  --brand-rgb:6,30,160;
  --ink:#0F1419;              /* 正文近黑 */
  --ink-2:#161616;
  --muted:#5B6675;            /* 次级文字 */
  --muted-2:#8A94A6;
  --line:#E7E7EB;             /* 描边/分隔 */
  --amber:#f59e0b;            /* 琥珀 · 在建 */
  --amber-bg:#FFF7ED;
  --green:#10b981;            /* 绿 · 运营中 */
  --green-bg:#ECFDF5;
  --qred:#E60012;             /* Qualcomm 副色 红（仅暗色 Hero 点睛） */
  --qred-hover:#b8000e;
  --blue-tint:#EEF1FB;        /* 蓝浅 chip */
  --bg:#FFFFFF;
  --bg-soft:#F7F8FA;
  --bg-soft-f:#F9F9FB;
  --bg-dark:#000000;          /* 暗色 Hero 背景 */
  --bg-deep:#0A0A0A;

  /* 字体 */
  --font-cn:"Source Han Sans SC","Source Han Sans CN","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-num:"Inter","Source Han Sans SC","PingFang SC",sans-serif;

  /* 圆角 */
  --radius-card:16px;
  --radius-chip:100px;
  --radius-icon:12px;
  --radius-btn:0;
  --radius-hero:24px;

  /* 节奏三档（章节间距） */
  --ry-s:80px;
  --ry-m:120px;
  --ry-l:180px;

  /* 页面两侧留白 */
  --gutter:80px;

  /* 阴影 */
  --shadow-card:0 6px 20px rgba(var(--brand-rgb),.06);
  --shadow-card-lg:0 16px 40px rgba(15,20,25,.10);
}

/* ---------- 2. Reset & Base ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
body{
  font-family:var(--font-cn);
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
img{display:block;max-width:100%;}
button{font-family:inherit;cursor:pointer;border:none;background:none;}
input,textarea,select{font-family:inherit;}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;font-weight:800;}
.wrap{max-width:1280px;margin:0 auto;padding:0 var(--gutter);}

/* 数字字体（数据带大数字） */
.num{font-family:var(--font-num);}

/* ---------- 3. 顶部导航 TopNav (组件 A) ---------- */
.nav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px;}
.nav-logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:18px;letter-spacing:.01em;}
.nav-logo .mark-img{height:40px;width:auto;flex-shrink:0;display:block;}
.nav-logo .brand-lock{display:flex;flex-direction:column;align-items:flex-start;gap:2px;line-height:1;}
.nav-logo .brand-lock .cn{height:22px;width:auto;display:block;}
.nav-logo .brand-lock .en{height:12px;width:auto;display:block;opacity:.92;}
.nav-menu{display:flex;align-items:center;gap:4px;}
.nav-link{
  font-size:14px;font-weight:600;color:var(--muted);
  padding:8px 14px;border-radius:var(--radius-chip);white-space:nowrap;transition:.15s;
}
.nav-link:hover{background:var(--blue-tint);color:var(--brand);}
.nav-link.active{color:var(--brand);position:relative;}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--brand);
}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;flex-shrink:0;margin-left:auto;
  color:var(--ink);background:none;border-radius:0;
  transition:.15s;
}
.nav-cta svg{width:22px;height:22px;display:block;}
.nav-cta:hover{color:var(--brand);}
.nav-cta:active{transform:scale(.94);}
.nav-inner .nav-cta{margin-left:auto;}
.nav-hamburger{display:none;flex-direction:column;gap:5px;padding:8px;}
.nav-hamburger span{width:24px;height:2px;background:var(--ink);transition:.2s;}
.nav-hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-hamburger.open span:nth-child(2){opacity:0;}
.nav-hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ---------- 4. 按钮 (组件 B / C) ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;font-weight:600;padding:16px 34px;border-radius:var(--radius-btn);
  transition:.15s;border:none;
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--brand);color:#fff;}
.btn-primary:hover{background:var(--brand-hover);}
.btn-qred{background:var(--qred);color:#fff;}
.btn-qred:hover{background:var(--qred-hover);}
.btn-outline{background:transparent;color:var(--brand);border:1.5px solid var(--brand);}
.btn-outline:hover{background:var(--blue-tint);}
.btn-outline-light{background:transparent;color:#fff;border:1.5px solid #fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.12);}
.btn-lg{font-size:17px;padding:18px 40px;}

/* ---------- 5. Chip 徽章 (组件 D) ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;padding:3px 12px;border-radius:var(--radius-chip);width:fit-content;white-space:nowrap;
}
.chip-blue{background:var(--blue-tint);color:var(--brand);}
.chip-amber{background:var(--amber-bg);color:#b45309;}
.chip-green{background:var(--green-bg);color:#047857;}
.chip .dot{width:6px;height:6px;border-radius:50%;background:currentColor;}

/* ---------- 6. Kicker / 标题层级 ---------- */
.kicker{
  font-size:14px;font-weight:700;color:var(--brand);letter-spacing:.06em;
  text-transform:uppercase;display:inline-block;margin-bottom:14px;
}
.kicker-light{color:var(--qred);}
.h-display{font-size:clamp(44px,6.5vw,88px);font-weight:800;line-height:1.08;letter-spacing:-.02em;}
.h-section{font-size:clamp(36px,5vw,72px);font-weight:800;line-height:1.1;letter-spacing:-.02em;}
.h-block{font-size:clamp(32px,4.2vw,56px);font-weight:800;line-height:1.12;letter-spacing:-.015em;}
.h-card{font-size:28px;font-weight:700;}
.lead{font-size:17px;color:var(--muted);max-width:720px;}
.lead-lg{font-size:22px;color:var(--muted);max-width:760px;line-height:1.7;}
.muted{color:var(--muted);}

/* ---------- 7. 暗色 Hero (组件 L) ---------- */
.hero-dark{
  position:relative;background:var(--bg-dark);color:#fff;overflow:hidden;
}
.hero-dark::before{
  content:"";position:absolute;top:-40%;right:-12%;width:62%;height:200%;
  background:radial-gradient(circle at center,rgba(230,0,18,.22),transparent 60%);
  transform:rotate(-12deg);z-index:0;pointer-events:none;
}
.hero-dark::after{
  content:"";position:absolute;left:-8%;bottom:-30%;width:50%;height:160%;
  background:radial-gradient(circle at center,rgba(6,30,160,.35),transparent 62%);
  z-index:0;pointer-events:none;
}
.hero-dark .wrap{position:relative;z-index:1;}
.hero-dark-inner{padding:var(--ry-l) 0 140px;max-width:920px;}
.hero-dark .eyebrow{
  color:var(--qred);font-size:14px;font-weight:700;text-transform:uppercase;
  letter-spacing:.12em;margin-bottom:22px;
}
.hero-dark .title{font-size:clamp(48px,7vw,96px);font-weight:800;line-height:1.05;letter-spacing:-.02em;margin-bottom:22px;}
.hero-dark .desc{font-size:20px;color:#c4c9d4;max-width:620px;margin-bottom:34px;line-height:1.7;}
.hero-dark .actions{display:flex;gap:16px;flex-wrap:wrap;}
.hero-dark .stats-strip{display:flex;gap:48px;margin-top:64px;flex-wrap:wrap;}
.hero-dark .stat b{font-family:var(--font-num);font-size:34px;font-weight:800;display:block;line-height:1.1;}
.hero-dark .stat span{font-size:13px;color:#9aa3b2;letter-spacing:.02em;}

/* ---------- 8. 浅色 Hero ---------- */
.hero-light{padding:var(--ry-l) 0;}
.hero-light .title{font-size:clamp(44px,6.2vw,88px);font-weight:800;line-height:1.08;letter-spacing:-.02em;margin-bottom:20px;}
.hero-light .desc{font-size:22px;color:var(--muted);max-width:760px;margin-bottom:34px;line-height:1.7;}

/* ---------- 9. 数据带 Stats Bar (组件 E) ---------- */
.stats-bar{background:var(--brand);color:#fff;}
.stats-bar .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;}
.stat-cell{padding:56px 40px;border-right:1px solid rgba(255,255,255,.16);}
.stat-cell:last-child{border-right:none;}
.stat-cell .val{font-family:var(--font-num);font-size:clamp(40px,4.5vw,64px);font-weight:800;line-height:1.05;letter-spacing:-.02em;}
.stat-cell .lbl{font-size:15px;color:rgba(255,255,255,.82);margin-top:12px;line-height:1.5;}

/* ---------- 10. 业务卡 Feature Card (组件 F) ---------- */
.feature-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.feature-card{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:40px;transition:.2s;display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-lg);}
.feature-card .icon{
  width:56px;height:56px;background:var(--blue-tint);color:var(--brand);
  border-radius:var(--radius-icon);display:flex;align-items:center;justify-content:center;
  font-size:26px;margin-bottom:24px;font-weight:800;
}
.feature-card h3{font-size:28px;margin-bottom:12px;}
.feature-card p{font-size:17px;color:var(--muted);flex:1;}
.feature-card .card-link{font-size:15px;font-weight:600;color:var(--amber);margin-top:24px;display:inline-flex;align-items:center;gap:6px;transition:.15s;}
.feature-card:hover .card-link{transform:translateX(6px);}

/* ---------- 11. 品牌矩阵 Brand Matrix (组件 J) ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.matrix-grid.cols-2{grid-template-columns:repeat(2,1fr);gap:24px;}
.matrix-card{
  border-radius:var(--radius-card);padding:28px 24px;min-height:230px;
  display:flex;flex-direction:column;color:#fff;position:relative;overflow:hidden;transition:.2s;
}
.matrix-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-lg);}
.matrix-card .no{font-size:11px;font-weight:700;opacity:.75;letter-spacing:.08em;}
.matrix-card h3{font-size:26px;margin-top:8px;font-weight:800;}
.matrix-card .sub{font-size:13px;opacity:.82;margin-top:8px;line-height:1.5;}
.matrix-card .cta{font-size:13px;font-weight:700;margin-top:auto;padding-top:18px;display:inline-flex;align-items:center;gap:6px;}
.matrix-card.m-blue{background:var(--brand);}
.matrix-card.m-soft{background:var(--bg-soft);color:var(--ink);border:1px solid var(--line);}
.matrix-card.m-soft .no,.matrix-card.m-soft .sub{color:var(--muted);}
.matrix-card.m-soft .cta{color:var(--brand);}
.matrix-card.m-dark{background:var(--ink-2);}
.matrix-card.m-amber{background:var(--amber);color:var(--ink-2);}
.matrix-card.m-amber .sub{color:rgba(15,20,25,.72);}

/* ---------- 12. 站点横滑卡 Site Slider (组件 G) ---------- */
.slider{position:relative;}
.slider-track{
  display:flex;gap:32px;overflow-x:auto;scroll-snap-type:x mandatory;
  scrollbar-width:none;padding-bottom:8px;-ms-overflow-style:none;
}
.slider-track::-webkit-scrollbar{display:none;}
.slider-track.dragging{scroll-snap-type:none;cursor:grabbing;}
.slide-main{
  flex:0 0 auto;width:min(880px,100%);scroll-snap-align:start;
  background:var(--brand);color:#fff;border-radius:var(--radius-card);
  padding:56px;min-height:440px;display:flex;flex-direction:column;justify-content:flex-end;
  position:relative;overflow:hidden;transition:.2s;
}
.slide-main::before{
  content:"";position:absolute;top:-30%;right:-10%;width:55%;height:160%;
  background:radial-gradient(circle at center,rgba(230,0,18,.16),transparent 60%);z-index:0;
}
.slide-main > *{position:relative;z-index:1;}
.slide-main .chip{margin-bottom:16px;}
.slide-main h3{font-size:clamp(40px,5vw,72px);font-weight:800;line-height:1.05;margin-bottom:14px;letter-spacing:-.02em;}
.slide-main .meta{font-size:18px;color:rgba(255,255,255,.9);margin-bottom:12px;font-weight:500;}
.slide-main .desc{font-size:15px;color:rgba(255,255,255,.82);max-width:600px;line-height:1.6;}
.slide-peek{
  flex:0 0 auto;width:368px;scroll-snap-align:start;
  background:var(--bg-soft-f);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:36px;min-height:440px;display:flex;flex-direction:column;
}
.slide-peek .chip{margin-bottom:auto;}
.slide-peek .pk{font-size:12px;font-weight:600;color:var(--muted);letter-spacing:.06em;margin-bottom:8px;}
.slide-peek h3{font-size:28px;font-weight:800;margin-bottom:8px;}
.slide-peek .meta{font-size:14px;color:var(--muted);margin-bottom:20px;}
.slide-peek .next{font-size:14px;font-weight:600;color:var(--brand);margin-top:auto;display:inline-flex;align-items:center;gap:6px;}
.slider-dots{display:flex;gap:8px;justify-content:center;margin-top:28px;}
.slider-dots .dot{width:24px;height:4px;border-radius:var(--radius-chip);background:var(--line);transition:.25s;cursor:pointer;}
.slider-dots .dot.active{width:40px;background:var(--brand);}

/* ---------- 13. 表单字段 Form Field (组件 H) ---------- */
.form-field{display:flex;flex-direction:column;gap:8px;}
.form-field label{font-size:13px;font-weight:600;color:var(--muted);}
.form-field label .req{color:var(--qred);}
.form-input{
  font-size:15px;color:var(--ink);background:var(--bg-soft-f);
  border:1.5px solid transparent;border-radius:8px;padding:14px 16px;transition:.15s;width:100%;
}
.form-input:focus{outline:none;border-color:var(--brand);background:#fff;}
.form-input.err{border-color:var(--qred);}
.form-hint{font-size:12px;color:var(--qred);display:none;}
.form-field.has-err .form-hint{display:block;}
.form-textarea{min-height:140px;resize:vertical;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;}

/* ---------- 14. 页脚 Link Wall (组件 M) ---------- */
.footer{background:var(--bg-dark);color:#fff;padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px;}
.footer-brand .footer-logo{display:inline-flex;align-items:center;gap:12px;margin-bottom:18px;}
.footer-brand .footer-logo .mark-img{height:36px;width:auto;display:block;filter:brightness(0) invert(1);}
.footer-brand .footer-logo .brand-lock{display:flex;flex-direction:column;align-items:flex-start;gap:2px;line-height:1;}
.footer-brand .footer-logo .brand-lock .cn{height:20px;width:auto;display:block;filter:brightness(0) invert(1);}
.footer-brand .footer-logo .brand-lock .en{height:11px;width:auto;display:block;opacity:.85;filter:brightness(0) invert(1);}
.footer-brand .slogan{font-size:15px;color:#9aa3b2;max-width:260px;line-height:1.7;}
.footer-col h4{font-size:13px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em;}
.footer-col a{display:block;font-size:13px;color:#9aa3b2;padding:5px 0;transition:.1s;}
.footer-col a:hover{color:#fff;}
.footer-bottom{border-top:1px solid #2a2d33;padding:22px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;}
.footer-bottom .copyright{font-size:12px;color:#7a828f;}
.footer-bottom .legal{display:flex;gap:20px;font-size:12px;color:#7a828f;}
.footer-bottom .legal a:hover{color:#fff;}

/* ---------- 15. Big Statement 大字宣言 (组件 K) ---------- */
.statement{background:var(--bg-soft);padding:var(--ry-l) 0;text-align:center;}
.statement .txt{font-size:clamp(36px,5.5vw,80px);font-weight:800;line-height:1.25;letter-spacing:-.02em;color:var(--ink);}
.statement .txt .accent{color:var(--brand);}

/* ---------- 16. 通用 Section ---------- */
.section{padding:var(--ry-m) 0;}
.section-tight{padding:var(--ry-s) 0;}
.section-head{margin-bottom:56px;}
.section-head.center{text-align:center;}
.section-head.center .lead{margin:0 auto;}

/* ---------- 17. 流程步骤 / 时间线 ---------- */
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.step-card{
  background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:32px 24px;transition:.2s;
}
.step-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-lg);}
.step-card .num{font-family:var(--font-num);font-size:44px;font-weight:800;color:var(--brand);line-height:1;display:block;margin-bottom:20px;}
.step-card h3{font-size:20px;margin-bottom:10px;}
.step-card p{font-size:14px;color:var(--muted);line-height:1.6;}

.timeline{position:relative;padding-left:32px;}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--line);}
.tl-item{position:relative;padding:0 0 44px 28px;}
.tl-item:last-child{padding-bottom:0;}
.tl-item::before{
  content:"";position:absolute;left:-30px;top:4px;width:14px;height:14px;border-radius:50%;
  background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 2px var(--brand);
}
.tl-item .year{font-family:var(--font-num);font-size:28px;font-weight:800;color:var(--brand);margin-bottom:8px;}
.tl-item h3{font-size:22px;margin-bottom:8px;}
.tl-item p{font-size:15px;color:var(--muted);max-width:560px;}

/* ---------- 18. 站点分类区 ---------- */
.station-cat{margin-bottom:64px;}
.station-cat:last-child{margin-bottom:0;}

/* ---------- 19. 联系页 ---------- */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start;}
.contact-info .info-item{display:flex;gap:16px;padding:20px 0;border-bottom:1px solid var(--line);}
.contact-info .info-item:first-child{padding-top:0;}
.contact-info .info-item .ic{width:44px;height:44px;background:var(--blue-tint);color:var(--brand);border-radius:var(--radius-icon);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0;font-weight:800;}
.contact-info .info-item h4{font-size:16px;margin-bottom:4px;}
.contact-info .info-item p{font-size:15px;color:var(--muted);}
.contact-form{background:var(--bg-soft-f);border:1px solid var(--line);border-radius:var(--radius-card);padding:40px;}

/* ---------- 20. 登录页 ---------- */
.login-layout{display:grid;grid-template-columns:1fr 1fr;min-height:calc(100vh - 72px);}
.login-brand{
  background:var(--brand);color:#fff;padding:80px;display:flex;flex-direction:column;justify-content:center;
  position:relative;overflow:hidden;
}
.login-brand::before{content:"";position:absolute;top:-30%;right:-15%;width:60%;height:150%;background:radial-gradient(circle at center,rgba(230,0,18,.18),transparent 60%);z-index:0;}
.login-brand > *{position:relative;z-index:1;}
.login-brand .logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;margin-bottom:40px;}
.login-brand .logo .mark{width:44px;height:44px;background:#fff;color:var(--brand);display:flex;align-items:center;justify-content:center;border-radius:10px;font-size:24px;font-weight:900;}
.login-brand h1{font-size:clamp(32px,4vw,56px);font-weight:800;line-height:1.15;margin-bottom:16px;}
.login-brand p{font-size:16px;color:rgba(255,255,255,.8);max-width:420px;line-height:1.7;}
.login-panel{padding:80px;display:flex;flex-direction:column;justify-content:center;}
.login-panel h2{font-size:28px;margin-bottom:8px;}
.login-panel .sub{font-size:15px;color:var(--muted);margin-bottom:32px;}
.login-divider{display:flex;align-items:center;gap:16px;margin:24px 0;color:var(--muted-2);font-size:13px;}
.login-divider::before,.login-divider::after{content:"";flex:1;height:1px;background:var(--line);}
.btn-wecom{
  display:flex;align-items:center;justify-content:center;gap:10px;width:100%;
  font-size:15px;font-weight:600;color:#fff;background:#1aad19;padding:16px;border-radius:var(--radius-btn);transition:.15s;
}
.btn-wecom:hover{background:#178f16;}
.btn-wecom:active{transform:scale(.98);}
.login-note{font-size:13px;color:var(--muted-2);margin-top:24px;line-height:1.6;}

/* ---------- 21. Toast ---------- */
.toast{
  position:fixed;bottom:32px;left:50%;transform:translate(-50%,20px);
  background:var(--ink);color:#fff;padding:14px 24px;border-radius:10px;
  font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:200;box-shadow:var(--shadow-card-lg);
}
.toast.show{opacity:1;transform:translate(-50%,0);}

/* ---------- 22. 滚动动效 ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease;}
.reveal.in{opacity:1;transform:none;}
.stagger-word{display:inline-block;opacity:0;transform:translateY(18px);transition:opacity .5s ease,transform .5s ease;}
.stagger-word.in{opacity:1;transform:none;}

/* ---------- 23. 响应式 4 断点 ---------- */
/* Desktop ≥1280 默认 */

/* Laptop 1024–1279 */
@media(max-width:1279px){
  :root{--gutter:48px;}
  .matrix-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
  .login-brand,.login-panel{padding:48px;}
}

/* Tablet 768–1023 */
@media(max-width:1023px){
  .nav-hamburger{display:flex;}
  .nav-menu{
    position:fixed;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:12px var(--gutter) 20px;
    transform:translateY(-8px);opacity:0;pointer-events:none;transition:.2s;
  }
  .nav-menu.open{transform:none;opacity:1;pointer-events:auto;}
  .nav-link{display:block;padding:14px 8px;font-size:16px;border-bottom:1px solid var(--bg-soft);}
  .nav-link.active::after{display:none;}
  .nav-inner .nav-cta{margin-left:10px;}
  .stats-bar .wrap{grid-template-columns:1fr 1fr;}
  .stat-cell{padding:40px 32px;border-right:none;border-bottom:1px solid rgba(255,255,255,.16);}
  .feature-grid{grid-template-columns:1fr;}
  .steps-grid{grid-template-columns:1fr 1fr;}
  .contact-layout{grid-template-columns:1fr;}
  .login-layout{grid-template-columns:1fr;}
  .login-brand{display:none;}
  .hero-dark .stats-strip{gap:32px;}
}

/* Mobile <768 */
@media(max-width:767px){
  :root{--gutter:24px;--ry-l:120px;--ry-m:80px;--ry-s:56px;}
  .hero-dark-inner{padding:96px 0 80px;}
  .hero-dark .title{font-size:42px;}
  .hero-dark .desc{font-size:17px;}
  .hero-dark .stats-strip{gap:28px;margin-top:40px;}
  .hero-dark .stat b{font-size:28px;}
  .hero-dark .actions{flex-direction:column;}
  .hero-dark .actions .btn{width:100%;justify-content:center;}
  .matrix-grid{grid-template-columns:1fr;}
  .matrix-card{min-height:auto;padding:24px;}
  .slide-main{min-height:360px;padding:32px;}
  .slide-peek{width:280px;min-height:360px;}
  .slide-main h3{font-size:40px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .form-row{grid-template-columns:1fr;}
  .contact-form{padding:24px;}
  .login-panel{padding:32px 24px;}
  .steps-grid{grid-template-columns:1fr;}
}

/* ---------- 23. 卡片背景图 (照片实景 cover) ---------- */
/* 用法：在卡片根节点用 class="... card-photo" + data-bg="/img/cards/xx.jpg"
   不改变卡片尺寸/位置/布局，仅铺背景图 + 底部深色渐变遮罩保证文字可读 */
.card-photo{
  position:relative;
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
}
.card-photo::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:linear-gradient(to top,rgba(10,14,26,.78) 0%,rgba(10,14,26,.45) 45%,rgba(10,14,26,.18) 100%);
  border-radius:inherit;pointer-events:none;
}
.card-photo > *{position:relative;z-index:1;}

/* 主卡（slide-main）图片下沿与卡片下沿对齐 */
.card-photo.slide-main{background-position:center bottom;}

.card-photo.card-lite{color:#fff;}
.card-photo.card-lite h3,.card-photo.card-lite .no{color:#fff;}
.card-photo.card-lite p,.card-photo.card-lite .sub,.card-photo.card-lite .meta,
.card-photo.card-lite .pk,.card-photo.card-lite .desc,.card-photo.card-lite .num,
.card-photo.card-lite .lbl{color:rgba(255,255,255,.92);}
.card-photo.card-lite .card-link,.card-photo.card-lite .next,
.card-photo.card-lite .cta{color:#fff;}
.card-photo.card-lite .icon{background:rgba(255,255,255,.16);color:#fff;}