/* Q-Drive 官网 — 工业科技风：深青蓝 #0D1B2A + 精密科技青 #00B4D8（依据方案 B 视觉基调） */
:root {
  --ink: #0d1b2a;
  --ink-2: #1b263b;
  --ink-3: #26364d;
  --cyan: #00b4d8;
  --cyan-d: #0093b3;
  --cyan-50: #e3f7fc;
  --text: #0d1b2a;
  --muted: #5b6b7f;
  --line: #dbe3ec;
  --paper: #f4f7fa;
  --white: #fff;
  --ok: #1a9a6c;
  --warn: #c98a12;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --num: "DIN Alternate", "Bahnschrift", "DIN", "Roboto Condensed", var(--font);
  --wrap: 1240px;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; font: 16px/1.75 var(--font); color: var(--text); background: var(--white); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--cyan-d); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.35; margin: 0; font-weight: 700; letter-spacing: .01em; }
p { margin: 0 0 1em; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 0; background: var(--cyan); color: #fff; padding: 8px 14px; z-index: 100; }
.skip:focus { left: 8px; }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

/* ── 按钮 ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 42px; padding: 0 20px; border-radius: 4px;
  border: 1px solid transparent; font-size: 15px; font-weight: 600; cursor: pointer; white-space: nowrap; text-decoration: none !important; transition: background .15s, border-color .15s, color .15s; }
.btn.sm { height: 34px; padding: 0 14px; font-size: 14px; }
.btn.lg { height: 50px; padding: 0 28px; font-size: 16px; }
.btn.block { width: 100%; }
.btn.cyan { background: var(--cyan); color: #fff; }
.btn.cyan:hover { background: var(--cyan-d); }
.btn.ghost { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn.ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn.line { border-color: var(--cyan); color: var(--cyan-d); background: #fff; }
.btn.line:hover { background: var(--cyan-50); }
.btn[disabled] { opacity: .55; cursor: not-allowed; }
.link { border: 0; background: none; color: var(--cyan-d); cursor: pointer; padding: 0; text-decoration: underline; }
.more { display: inline-block; margin-top: 8px; color: var(--cyan-d); font-weight: 600; border: 0; background: none; cursor: pointer; padding: 0; font-size: 15px; }
.more::after { content: " ›"; }

/* ── 顶部导航 ── */
.hd { position: sticky; top: 0; z-index: 50; background: var(--ink); color: #fff; border-bottom: 1px solid rgba(255,255,255,.06); }
.hd-in { display: flex; align-items: center; gap: 28px; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; flex: none; text-decoration: none !important; }
.brand img { height: 30px; width: auto; }
.brand-tag { font-size: 12px; color: rgba(255,255,255,.62); line-height: 1.35; max-width: 9.5em; }
.nav { display: flex; align-items: center; gap: 4px; flex: 1; }
.nav > a, .dd > a { white-space: nowrap; color: rgba(255,255,255,.86); padding: 8px 12px; border-radius: 4px; font-size: 15px; text-decoration: none !important; display: block; }
.nav > a:hover, .dd > a:hover, .nav a.on { color: #fff; }
.nav a.on { box-shadow: inset 0 -2px 0 var(--cyan); border-radius: 0; }
.dd { position: relative; }
.dd > a::after { content: ""; display: inline-block; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(45deg) translate(-2px, -2px); margin-left: 8px; opacity: .7; }
.dd-menu { position: absolute; top: 100%; left: 0; min-width: 300px; background: #fff; color: var(--text); border-radius: 6px; padding: 8px; box-shadow: 0 18px 50px rgba(13,27,42,.28);
  opacity: 0; visibility: hidden; transform: translateY(6px); transition: opacity .15s, transform .15s, visibility .15s; }
.dd:hover .dd-menu, .dd:focus-within .dd-menu { opacity: 1; visibility: visible; transform: none; }
.dd-menu a { display: block; padding: 9px 12px; border-radius: 4px; color: var(--text); font-weight: 600; font-size: 14.5px; text-decoration: none !important; }
.dd-menu a small { display: block; font-weight: 400; color: var(--muted); font-size: 12.5px; }
.dd-menu a:hover { background: var(--cyan-50); }
.hd-act { display: flex; align-items: center; gap: 10px; }
.lang { color: rgba(255,255,255,.55); font-size: 13px; text-decoration: none !important; padding: 4px 6px; }
.lang b { font-weight: 500; } .lang b.on { color: #fff; font-weight: 700; }
.btn.crm { border-color: rgba(255,255,255,.35); color: #fff; background: var(--ink-2); height: 38px; font-size: 14px; padding: 0 14px; }
.btn.crm:hover { border-color: var(--cyan); }
.btn.crm svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.hd-act .btn.cyan { height: 38px; font-size: 14px; padding: 0 16px; }
.burger { display: none; width: 40px; height: 40px; border: 0; background: none; cursor: pointer; padding: 9px; }
.burger span { display: block; height: 2px; background: #fff; margin: 5px 0; border-radius: 1px; }
@media (max-width: 1480px) { .brand-tag { display: none; } }
@media (max-width: 1200px) { .nav > a, .dd > a { padding: 8px 9px; } }
@media (max-width: 1040px) {
  .burger { display: block; }
  .hd-act .btn.cyan { display: none; }
  .nav { position: fixed; inset: 72px 0 0 0; background: var(--ink); flex-direction: column; align-items: stretch; padding: 12px 20px 40px; overflow-y: auto; gap: 0;
    transform: translateX(100%); transition: transform .22s; }
  .nav.open { transform: none; }
  .nav > a, .dd > a { padding: 14px 4px; border-bottom: 1px solid rgba(255,255,255,.08); font-size: 16px; }
  .nav a.on { box-shadow: none; color: var(--cyan); }
  .dd-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: transparent; padding: 0 0 8px 12px; min-width: 0; }
  .dd-menu a { color: rgba(255,255,255,.8); font-weight: 400; }
  .dd-menu a small { display: none; }
  .dd-menu a:hover { background: rgba(255,255,255,.06); }
  .dd > a::after { display: none; }
}
@media (max-width: 560px) { .btn.crm { font-size: 0; padding: 0 10px; gap: 0; } .btn.crm::before { content: "CRM"; font-size: 13px; margin-right: 4px; } .hd-in { gap: 12px; } .lang { display: none; } }

/* ── 首屏 ── */
.hero { background: var(--ink); color: #fff; position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; 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: 40px 40px; mask-image: linear-gradient(to bottom, #000 30%, transparent); pointer-events: none; }
.hero-in { position: relative; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 48px; align-items: center; padding-top: 72px; padding-bottom: 48px; }
.hero-tag { display: inline-block; color: var(--cyan); font-size: 14px; font-weight: 600; border-left: 3px solid var(--cyan); padding-left: 10px; margin-bottom: 20px; }
.hero h1 { font-size: clamp(30px, 3.4vw, 48px); font-weight: 800; letter-spacing: .03em; line-height: 1.28; margin-bottom: 24px; }
@media (min-width: 900px) { .hero h1 span { white-space: nowrap; } }
.hero h1 span { display: block; }
.lang-en .hero h1 { letter-spacing: 0; font-size: clamp(30px, 3.8vw, 48px); }
.hero-sub { color: rgba(255,255,255,.76); font-size: 17px; max-width: 36em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 30px; }
.hero-art { margin: 0; position: relative; }
.hero-art > img { border-radius: 6px; margin-bottom: 12px; aspect-ratio: 16/10; object-fit: cover; width: 100%; }
.hero-art figcaption { position: absolute; left: -9999px; }
.spc { width: 100%; height: auto; display: block; }
.spc .axis line { stroke: rgba(255,255,255,.25); stroke-width: 1; }
.spc .limits line { stroke: rgba(0,180,216,.55); stroke-dasharray: 6 6; stroke-width: 1.2; }
.spc .limits line.cl { stroke: rgba(255,255,255,.4); stroke-dasharray: none; }
.spc .limits text, .spc .note text { fill: rgba(255,255,255,.7); font: 600 12px var(--num); }
.spc .note text { font-family: var(--font); font-weight: 500; fill: #ff8a7a; font-size: 12.5px; }
.spc .note.late text { fill: var(--cyan); }
.spc .note line { stroke: #ff8a7a; stroke-width: 1; }
.spc .note.late line { stroke: var(--cyan); stroke-dasharray: 3 3; }
.spc .trace { fill: none; stroke: var(--cyan); stroke-width: 2; stroke-linejoin: round; stroke-dasharray: 1200; stroke-dashoffset: 1200; animation: draw 2.4s .3s ease-out forwards; }
.spc .pt { fill: var(--ink); stroke: var(--cyan); stroke-width: 2; opacity: 0; animation: pop .3s ease-out forwards; animation-delay: calc(.3s + var(--i) * .13s); }
.spc .pt.out { fill: #ff6b57; stroke: #fff; }
.spc .note { opacity: 0; animation: pop .4s ease-out 1.2s forwards; }
.spc .note.late { animation-delay: 2.6s; }
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes pop { from { opacity: 0; } to { opacity: 1; } }
.stats { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid rgba(255,255,255,.12); padding-top: 0; padding-bottom: 0; }
.stat { padding: 22px 24px 26px 0; display: flex; gap: 14px; align-items: baseline; }
.stat + .stat { border-left: 1px solid rgba(255,255,255,.12); padding-left: 24px; }
.stat b { color: var(--cyan); font-size: 18px; flex: none; }
.stat span { color: rgba(255,255,255,.75); font-size: 14.5px; }
@media (max-width: 900px) { .hero-in { grid-template-columns: 1fr; padding-top: 44px; gap: 28px; } .stats { grid-template-columns: 1fr; } .stat + .stat { border-left: 0; border-top: 1px solid rgba(255,255,255,.12); padding-left: 0; } }

/* ── 区块 ── */
.sec { padding: 84px 0; }
.sec.alt { background: var(--paper); }
.sec.dark { background: var(--ink); color: #fff; }
.sec.dark .sec-sub, .sec.dark p { color: rgba(255,255,255,.75); }
.sec-h { font-size: clamp(24px, 2.6vw, 32px); margin-bottom: 12px; }
.sec-sub { color: var(--muted); font-size: 16.5px; margin-bottom: 36px; max-width: 44em; }
.sec-h + .duo, .sec-h + .steps, .sec-h + .experts, .sec-h + .cases, .sec-h + .media-grid, .sec-h + .courses, .sec-h + .trio, .sec-h + .logo-wall { margin-top: 36px; }
.sec-top { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; margin-bottom: 8px; }
.sec-top .sec-sub { margin-bottom: 24px; }
.note-line { font-size: 14px; color: var(--muted); margin-top: 20px; }
.row-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.empty { color: var(--muted); padding: 24px 0; }
.eyebrow { color: var(--cyan-d); font-size: 13.5px; font-weight: 600; margin-bottom: 8px; }
.sec.dark .eyebrow { color: var(--cyan); }
.ticks { list-style: none; padding: 0; margin: 14px 0; }
.ticks li { position: relative; padding-left: 22px; margin: 7px 0; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 9px; height: 5px; border-left: 2px solid var(--cyan); border-bottom: 2px solid var(--cyan); transform: rotate(-45deg); }
.ticks.small li { font-size: 14px; margin: 4px 0; }
.ticks.num { counter-reset: n; }
.ticks.num li { padding-left: 34px; counter-increment: n; }
.ticks.num li::before { content: counter(n); border: 0; transform: none; width: 22px; height: 22px; border-radius: 50%; background: var(--cyan); color: #fff; font: 700 12px/22px var(--num); text-align: center; top: .25em; left: 0; }
.ticks.cols { columns: 2; column-gap: 32px; }
@media (max-width: 700px) { .ticks.cols { columns: 1; } .sec { padding: 56px 0; } }

/* 三步闭环：真实的顺序，用编号与连接线表达 */
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; counter-reset: s; }
.step { position: relative; padding: 32px 32px 30px; border: 1px solid var(--line); background: #fff; }
.step + .step { border-left: 0; }
.step + .step::before { content: ""; position: absolute; left: -11px; top: 46px; width: 20px; height: 20px; background: #fff; border-top: 1px solid var(--line); border-right: 1px solid var(--line); transform: rotate(45deg); }
.step-n { display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: var(--ink); color: var(--cyan); font: 700 17px var(--num); margin-bottom: 14px; }
.step h3 { font-size: 20px; margin-bottom: 10px; }
.step h3 small { font-size: 13px; color: var(--muted); font-weight: 500; margin-left: 8px; }
.step p { color: var(--muted); font-size: 15px; }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr; } .step + .step { border-left: 1px solid var(--line); border-top: 0; } .step + .step::before { left: 40px; top: -11px; transform: rotate(135deg); } }

/* 公开课班次 */
.sessions { list-style: none; padding: 0; margin: 0; border-top: 2px solid var(--ink); }
.sess { display: grid; grid-template-columns: 150px minmax(0, 1fr) auto auto; gap: 20px; align-items: center; padding: 18px 4px; border-bottom: 1px solid var(--line); background: #fff; }
.sec.alt .sess { background: transparent; }
.sess-date b { display: block; font: 700 18px var(--num); letter-spacing: .02em; }
.sess-date span { font-size: 13.5px; color: var(--cyan-d); font-weight: 600; }
.sess-title { font-weight: 700; color: var(--text); font-size: 16.5px; }
.sess-meta { display: block; font-size: 13.5px; color: var(--muted); }
.seat { font-size: 13px; font-weight: 600; padding: 2px 10px; border-radius: 12px; white-space: nowrap; }
.seat-open { background: var(--cyan-50); color: var(--cyan-d); }
.seat-tight { background: #fdf1dc; color: var(--warn); }
.seat-full, .seat-end { background: #eef1f5; color: var(--muted); }
.sess-act { display: flex; gap: 8px; }
.sess.ended { opacity: .6; }
.sessions.compact .sess { grid-template-columns: 1fr; gap: 6px; padding: 12px 0; }
@media (max-width: 800px) { .sess { grid-template-columns: 1fr auto; gap: 8px 12px; } .sess-main { grid-column: 1 / -1; order: 3; } .sess-act { grid-column: 1 / -1; order: 4; } }
.month-h { font: 700 15px var(--font); color: var(--muted); margin: 36px 0 10px; }
.month-h span { font: 700 34px var(--num); color: var(--ink); margin-right: 4px; }
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 8px; }
.filters select { height: 40px; border: 1px solid var(--line); border-radius: 4px; padding: 0 10px; min-width: 140px; background: #fff; font: inherit; font-size: 15px; }

/* 双栏卡片 */
.duo { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; align-items: start; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.trio h3 { font-size: 18px; margin-bottom: 8px; color: #fff; }
@media (max-width: 900px) { .duo, .trio { grid-template-columns: 1fr; } }
.panel-card { border: 1px solid var(--line); border-top: 3px solid var(--cyan); padding: 30px 30px 26px; background: #fff; }
.panel-card h3 { font-size: 21px; }
.prod { background: var(--ink-2); border: 1px solid rgba(255,255,255,.1); padding: 30px; border-radius: 4px; }
.prod h3 { font-size: 22px; } .prod h3 a { color: #fff; }
.prod-tag { color: rgba(255,255,255,.7); margin-top: 6px; }
.prod-aud { font-size: 14px; color: rgba(255,255,255,.6) !important; }
.prod-act { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.prod.light { background: #fff; border-color: var(--line); border-top: 3px solid var(--cyan); }
.prod.light h3 a { color: var(--text); } .prod.light .prod-tag, .prod.light .prod-aud { color: var(--muted) !important; }
.cta-box { background: var(--ink-2); border: 1px solid rgba(255,255,255,.12); padding: 32px; border-radius: 4px; }
.cta-box h3 { font-size: 21px; margin-bottom: 8px; color: #fff; }
.cta-box.light { background: var(--paper); border-color: var(--line); }
.cta-box.light h3 { color: var(--text); } .cta-box.light p { color: var(--muted); }

/* 质量视界 */
.media-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 48px; }
@media (max-width: 900px) { .media-grid { grid-template-columns: 1fr; } }
.col-h { font-size: 17px; padding-bottom: 10px; border-bottom: 2px solid var(--ink); margin-bottom: 4px; }
.col-sub { font-weight: 600; margin: 18px 0 6px; }
.art { display: grid; grid-template-columns: 148px minmax(0, 1fr); gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.art-cover img, .art-ph { width: 148px; height: 100px; object-fit: cover; border-radius: 3px; }
.art-ph { display: grid; place-items: center; background: var(--ink); color: var(--cyan); font-weight: 700; font-size: 15px; }
.art h3 { font-size: 17px; } .art h3 a { color: var(--text); }
.art-meta { font-size: 13px; color: var(--muted); margin: 4px 0 6px; }
.tag { color: var(--cyan-d); margin-left: 6px; }
.art-digest { font-size: 14.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 6px; }
.art-act { display: flex; gap: 16px; align-items: center; font-size: 14px; margin: 0; }
.qr-btn { border: 0; background: none; color: var(--muted); cursor: pointer; padding: 0; font-size: 14px; }
.qr-btn:hover { color: var(--cyan-d); }
@media (max-width: 560px) { .art { grid-template-columns: 96px 1fr; } .art-cover img, .art-ph { width: 96px; height: 72px; } .qr-btn { display: none; } }
.player video, .vcard video { width: 100%; aspect-ratio: 16/9; background: #000; border-radius: 4px; display: block; }
.player h4 { margin: 12px 0 4px; font-size: 16px; }
.player p { color: var(--muted); font-size: 14.5px; }
.vlist { padding-left: 18px; margin: 0; } .vlist li { margin: 4px 0; }
.follow { display: flex; gap: 14px; align-items: center; margin-top: 22px; padding: 14px; background: var(--paper); border-radius: 4px; }
.follow p { margin: 0; font-size: 14.5px; }
.videos { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 28px; }
.vcard h3 { font-size: 17px; margin: 12px 0 4px; } .vcard h3 small { color: var(--muted); font-weight: 400; font-size: 13px; }
.vcard p { font-size: 14.5px; color: var(--muted); }
.arts .art:first-child { padding-top: 0; }
.tagbar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tagbar a, .pager a { padding: 4px 12px; border: 1px solid var(--line); border-radius: 16px; font-size: 14px; color: var(--text); text-decoration: none; }
.tagbar a.on, .pager a.on { background: var(--ink); border-color: var(--ink); color: #fff; }
.pager { display: flex; gap: 6px; justify-content: center; margin-top: 28px; }
.res-list { list-style: none; padding: 0; margin: 0; border-top: 2px solid var(--ink); }
.res { display: grid; grid-template-columns: 110px minmax(0, 1fr) auto; gap: 18px; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line); }
.res h3 { font-size: 17px; } .res p { font-size: 14.5px; color: var(--muted); margin: 2px 0 0; }
.res-cat { font-size: 13px; color: var(--cyan-d); font-weight: 600; }
@media (max-width: 640px) { .res { grid-template-columns: 1fr; gap: 6px; } }

/* 专家 / 案例 / 课程 */
.experts { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 24px; }
.expert { border: 1px solid var(--line); padding: 24px; background: #fff; }
.avatar { width: 72px; height: 72px; border-radius: 50%; overflow: hidden; background: var(--ink); display: grid; place-items: center; margin-bottom: 14px; }
.avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar span { color: var(--cyan); font-size: 28px; font-weight: 700; }
.expert h3 { font-size: 19px; }
.expert-title { color: var(--muted); font-size: 14px; margin: 2px 0 10px; }
.expert-bio { font-size: 14.5px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips span { font-size: 12.5px; padding: 1px 9px; background: var(--cyan-50); color: var(--cyan-d); border-radius: 10px; }
.cases { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 24px; }
.case { background: #fff; border: 1px solid var(--line); padding: 26px; }
.case-meta { font-size: 13px; color: var(--cyan-d); font-weight: 600; margin-bottom: 6px; }
.case h3 { font-size: 18px; margin-bottom: 4px; }
.case-client { color: var(--muted); font-size: 14px; }
.case p b { display: inline-block; margin-right: 8px; color: var(--text); }
.case p { font-size: 14.5px; }
.case-result b { color: var(--ok) !important; }
.case blockquote { margin: 14px 0 0; padding-left: 14px; border-left: 3px solid var(--cyan); color: var(--muted); font-size: 14.5px; }
.logo-wall { list-style: none; padding: 0; margin: 0 0 32px; display: flex; flex-wrap: wrap; gap: 10px 32px; }
.logo-wall li { font-weight: 700; color: var(--ink-3); font-size: 16px; }
.courses { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
.course { display: block; border: 1px solid var(--line); padding: 22px; color: var(--text); text-decoration: none !important; transition: border-color .15s; }
.course:hover { border-color: var(--cyan); }
.course-cat { font-size: 13px; color: var(--cyan-d); font-weight: 600; }
.course h3 { font-size: 17px; margin: 6px 0 8px; }
.course p { font-size: 14.5px; color: var(--muted); margin: 0 0 8px; }
.course-meta { font-size: 13px !important; }
.path { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.path > li { padding: 24px 24px 22px; border-top: 3px solid var(--ink); position: relative; background: #fff; margin-right: 12px; }
.path > li h3 { font-size: 19px; margin-bottom: 10px; }
.path ul { padding-left: 18px; margin: 0; font-size: 14.5px; } .path ul li { margin: 4px 0; }
@media (max-width: 900px) { .path { grid-template-columns: 1fr 1fr; gap: 12px; } .path > li { margin: 0; } }
@media (max-width: 560px) { .path { grid-template-columns: 1fr; } }
.modules { display: grid; gap: 0; }
.module { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 20px; padding: 40px 0; border-bottom: 1px solid var(--line); }
.module:first-child { padding-top: 0; }
.module h2 { font-size: 24px; margin-bottom: 8px; }
.module p { color: var(--muted); max-width: 46em; }

/* 内页 */
.page-hd { background: var(--ink); color: #fff; padding: 56px 0 52px; }
.page-hd h1 { font-size: clamp(28px, 3.4vw, 40px); margin-bottom: 12px; }
.page-hd p { color: rgba(255,255,255,.75); max-width: 46em; font-size: 16.5px; }
.crumbs { font-size: 13.5px; color: rgba(255,255,255,.55) !important; margin-bottom: 14px !important; }
.crumbs a { color: rgba(255,255,255,.75); }
.hd-meta { display: flex; flex-wrap: wrap; gap: 18px; color: var(--cyan); font-weight: 600; font-size: 15px; }
.tabs { display: flex; gap: 6px; margin-top: 22px; }
.tabs a { color: rgba(255,255,255,.75); padding: 8px 16px; border: 1px solid rgba(255,255,255,.2); border-radius: 20px; text-decoration: none; font-size: 15px; }
.tabs a.on { background: var(--cyan); border-color: var(--cyan); color: #fff; }
.detail { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 56px; }
.detail-main h2 { font-size: 21px; margin: 30px 0 10px; } .detail-main h2:first-child { margin-top: 0; }
.detail-side h3 { font-size: 16px; margin: 0 0 8px; padding-bottom: 8px; border-bottom: 2px solid var(--ink); }
.detail-side h3 ~ h3 { margin-top: 28px; }
.outline { padding-left: 22px; } .outline li { margin: 8px 0; } .outline b { color: var(--cyan-d); margin-right: 10px; }
.soft-note { margin-top: 32px; padding: 22px 24px; background: var(--cyan-50); border-left: 3px solid var(--cyan); }
.soft-note h2 { margin-top: 0 !important; }
.plain { list-style: none; padding: 0; } .plain li { margin: 6px 0; }
@media (max-width: 900px) { .detail { grid-template-columns: 1fr; gap: 32px; } }
.contact { margin: 0 0 18px; } .contact div { display: grid; grid-template-columns: 88px 1fr; padding: 8px 0; border-bottom: 1px solid var(--line); }
.contact dt { color: var(--muted); } .contact dd { margin: 0; }
.prose { max-width: 820px; } .prose h2 { font-size: 19px; margin: 26px 0 8px; }
.nf { min-height: 50vh; }

/* 通栏 CTA */
.band { background: var(--cyan); color: #fff; padding: 52px 0; }
.band-in { display: grid; grid-template-columns: 1fr auto; gap: 8px 32px; align-items: center; }
.band h2 { font-size: 26px; } .band p { margin: 0; opacity: .9; grid-column: 1; }
.band .btn { grid-row: 1 / 3; grid-column: 2; background: var(--ink); }
.band .btn:hover { background: var(--ink-2); }
@media (max-width: 700px) { .band-in { grid-template-columns: 1fr; } .band .btn { grid-row: auto; grid-column: 1; margin-top: 12px; } }

/* 页脚 */
.ft { background: var(--ink); color: rgba(255,255,255,.7); font-size: 14.5px; padding-top: 56px; }
.ft-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr 1.2fr; gap: 32px; padding-bottom: 40px; }
.ft-brand img { height: 32px; width: auto; margin-bottom: 14px; }
.ft dl { margin: 14px 0 0; } .ft dl div { display: flex; gap: 10px; margin: 4px 0; } .ft dt { color: rgba(255,255,255,.5); flex: none; } .ft dd { margin: 0; }
.ft h4 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.ft a { color: rgba(255,255,255,.7); display: block; margin: 6px 0; }
.ft a:hover { color: #fff; }
.ft-qr { display: flex; flex-wrap: wrap; gap: 14px; align-content: flex-start; }
.ft-qr h4 { width: 100%; margin-bottom: 4px; }
.ft-qr figure { margin: 0; text-align: center; font-size: 12.5px; } .ft-qr img { background: #fff; padding: 4px; border-radius: 3px; }
.ft-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; border-top: 1px solid rgba(255,255,255,.1); padding: 18px 24px 24px; font-size: 13px; }
.ft-bottom a { display: inline; margin: 0; }
@media (max-width: 900px) { .ft-grid { grid-template-columns: 1fr 1fr; } .ft-brand { grid-column: 1 / -1; } }

/* 留资弹窗 */
dialog.lead { border: 0; padding: 0; border-radius: 8px; width: min(640px, calc(100% - 24px)); max-height: calc(100vh - 32px); box-shadow: 0 30px 80px rgba(13,27,42,.45); color: var(--text); }
dialog.lead::backdrop { background: rgba(13,27,42,.62); }
dialog.lead[open] { animation: up .2s ease-out; }
@keyframes up { from { transform: translateY(12px); opacity: 0; } }
.lead-form, .lead-done { padding: 26px 28px 24px; }
.lead-hd { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.lead-hd h2 { font-size: 21px; }
.x { border: 0; background: none; font-size: 28px; line-height: 1; cursor: pointer; color: var(--muted); padding: 4px 8px; }
.lead-sub { color: var(--muted); font-size: 14.5px; margin: 6px 0 14px; }
.lead-ctx { background: var(--cyan-50); color: var(--cyan-d); padding: 8px 12px; border-radius: 4px; font-size: 14px; font-weight: 600; margin-bottom: 14px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.span2 { grid-column: 1 / -1; }
.f { display: block; margin: 0; }
.f > span:first-child, .f legend { display: block; font-size: 13.5px; color: var(--muted); margin-bottom: 4px; }
.f b { color: #d6453a; font-weight: 400; }
.f input, .f select, .f textarea { width: 100%; height: 42px; border: 1px solid var(--line); border-radius: 4px; padding: 0 12px; font: inherit; font-size: 15px; background: #fff; color: var(--text); }
.f textarea { height: auto; padding: 10px 12px; resize: vertical; }
.f input:focus, .f select:focus, .f textarea:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(0,180,216,.18); }
.f .row { display: flex; gap: 8px; } .f .row input { flex: 1; min-width: 0; } .f .row .btn { height: 42px; flex: none; }
.dev-code { color: var(--warn); font-size: 12.5px; }
.intents { border: 0; padding: 0; margin: 14px 0 6px; display: flex; flex-wrap: wrap; gap: 8px; }
.intents legend { width: 100%; }
.radio { cursor: pointer; }
.radio input { position: absolute; opacity: 0; }
.radio span { display: inline-block; padding: 7px 14px; border: 1px solid var(--line); border-radius: 4px; font-size: 14.5px; }
.radio input:checked + span { border-color: var(--cyan); background: var(--cyan-50); color: var(--cyan-d); font-weight: 600; }
.radio input:focus-visible + span { outline: 3px solid var(--cyan); }
.extra { display: none; margin: 10px 0 4px; } .extra.on { display: grid; }
.lead-form > .f { margin-top: 10px; }
.agree { display: flex; align-items: center; gap: 6px; font-size: 13.5px; color: var(--muted); margin: 12px 0; }
.msg { color: #d6453a; font-size: 14px; margin: 0 0 10px; }
.lead-done { text-align: center; padding: 48px 32px 40px; }
.ok-mark { width: 56px; height: 56px; border-radius: 50%; background: var(--cyan); color: #fff; font-size: 30px; line-height: 56px; margin: 0 auto 14px; }
.lead-done h2 { font-size: 22px; margin-bottom: 8px; }
@media (max-width: 560px) { .grid2 { grid-template-columns: 1fr; } .lead-form { padding: 22px 18px; } }
.qr-pop { position: fixed; z-index: 90; background: #fff; padding: 12px; border-radius: 6px; box-shadow: 0 14px 40px rgba(13,27,42,.3); text-align: center; font-size: 13px; color: var(--muted); }
.qr-pop img { width: 150px; height: 150px; }
.vph { aspect-ratio: 16/9; background: var(--ink); border-radius: 4px; display: grid; place-items: center; }
.vph span { width: 56px; height: 56px; border-radius: 50%; border: 2px solid var(--cyan); color: var(--cyan); display: grid; place-items: center; font-size: 20px; }
.nav-cta, .nav-lang { display: none !important; }
@media (max-width: 1040px) { .nav-cta { display: flex !important; margin-top: 20px; height: 48px; } .nav-lang { display: block !important; color: rgba(255,255,255,.7); padding: 14px 4px; } }

/* ── 新版 PRD 补充 ── */
.hero-cta .btn.ghost + .btn.ghost { border-color: transparent; text-decoration: underline !important; text-underline-offset: 4px; padding-left: 8px; padding-right: 8px; }
.sub-sec { font-size: 18px; margin: 44px 0 16px; }
.path.mini > li { background: transparent; padding: 18px 18px 14px 0; }
.path.mini h4 { font-size: 16px; margin-bottom: 6px; }
.path.mini .step-n { width: 28px; height: 28px; font-size: 14px; margin-bottom: 8px; }
.quals { list-style: none; padding: 0; margin: 0 0 32px; display: flex; flex-wrap: wrap; gap: 10px; }
.quals li { border: 1px solid var(--line); background: #fff; padding: 8px 14px; font-size: 14.5px; font-weight: 600; }
.quals li::before { content: ""; display: inline-block; width: 8px; height: 8px; background: var(--cyan); margin-right: 8px; vertical-align: 1px; }
.experts.compact { margin-bottom: 32px; }
.rating { font-size: 13.5px; color: var(--muted); margin: -6px 0 8px; } .rating b { font: 700 16px var(--num); color: var(--ok); }
.sub-h { font-size: 13px; font-weight: 600; color: var(--muted); margin: 10px 0 0; }
.svc { display: inline-block; margin-left: 8px; padding: 0 8px; border-radius: 9px; background: var(--ink); color: var(--cyan); font-size: 12px; }
.case-metric { font: 700 17px/1.5 var(--num); color: var(--ok); border-left: 3px solid var(--ok); padding-left: 10px; margin: 10px 0 12px; }
.flow { list-style: none; padding: 0; margin: 18px 0; display: flex; flex-wrap: wrap; gap: 0; }
.flow li { position: relative; padding: 10px 26px 10px 14px; background: var(--paper); margin-right: 14px; font-size: 14.5px; font-weight: 600; }
.flow li span { display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; background: var(--cyan); color: #fff; font: 700 11px var(--num); margin-right: 8px; }
.flow li:not(:last-child)::after { content: ""; position: absolute; right: -9px; top: 50%; width: 12px; height: 12px; border-top: 2px solid var(--cyan); border-right: 2px solid var(--cyan); transform: translateY(-50%) rotate(45deg); background: transparent; }
.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 12px; margin: 16px 0 6px; }
.gallery img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border: 1px solid var(--line); }
.gallery.shots { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); } .gallery.shots img { aspect-ratio: 16/10; }
.rich { max-width: 46em; } .rich h3 { font-size: 18px; margin: 20px 0 8px; } .rich ul, .rich ol { padding-left: 22px; } .rich li { margin: 4px 0; }
.rich table { border-collapse: collapse; width: 100%; margin: 12px 0; } .rich td, .rich th { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
.rich img { margin: 12px 0; border: 1px solid var(--line); }
.prod-shot { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 3px; margin: 12px 0; border: 1px solid var(--line); }
.player { margin-top: 18px; } .player:first-of-type { margin-top: 10px; }
.player-meta { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.player-meta .qr-btn { flex: none; margin-top: 12px; }
.small { font-size: 14px; }
.done-files { margin: 8px 0 18px; } .done-files h3 { font-size: 15px; margin-bottom: 10px; color: var(--muted); font-weight: 600; }
.done-files ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.done-files li { display: flex; flex-direction: column; align-items: center; gap: 2px; } .done-files small { color: var(--muted); }
.done-files .btn { max-width: 100%; white-space: normal; height: auto; min-height: 44px; padding: 8px 18px; }
.done-consultant { display: flex; gap: 16px; align-items: center; text-align: left; background: var(--paper); border-radius: 6px; padding: 14px; margin: 0 0 16px; }
.done-consultant img { flex: none; background: #fff; padding: 4px; border-radius: 4px; }
.done-consultant b { font-size: 15.5px; } .done-consultant p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
@media (max-width: 480px) { .done-consultant { flex-direction: column; text-align: center; } }