/* ==========================================================================
   意克互动 YIKE INTERACTIVE — 官网样式系统
   品牌色取自语 LOGO 四色环：蓝 / 青 / 绿 / 橙
   ========================================================================== */

:root {
  --blue-900: #062a63;
  --blue-800: #0a3d91;
  --blue-700: #0f4fae;
  --blue-600: #1657b0;
  --blue-500: #1f6fd0;
  --blue-100: #e8f0fb;
  --blue-50: #f4f8fd;

  --cyan: #29abe2;
  --green: #7cc243;
  --orange: #f5a623;
  --amber: #f7b955;

  --ink: #0e1726;
  --ink-2: #354156;
  --ink-3: #6b7789;
  --ink-4: #9aa4b4;
  --line: #e6ebf2;
  --line-2: #f0f3f8;
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --bg-soft-2: #eef3fa;

  --ok: #2fa36b;
  --warn: #e8833a;
  --danger: #d94a4a;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;

  --sh-sm: 0 1px 2px rgba(14, 23, 38, 0.05), 0 2px 8px rgba(14, 23, 38, 0.04);
  --sh-md: 0 4px 12px rgba(14, 23, 38, 0.06), 0 12px 32px rgba(14, 23, 38, 0.06);
  --sh-lg: 0 12px 28px rgba(14, 23, 38, 0.08), 0 32px 72px rgba(14, 23, 38, 0.08);

  --maxw: 1240px;
  --nav-h: 72px;

  --font: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-num: "SF Mono", "DIN Alternate", ui-monospace, "Roboto Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  line-height: 1.7;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; }

.wrap { width: min(100% - 48px, var(--maxw)); margin: 0 auto; }
@media (max-width: 720px) { .wrap { width: calc(100% - 32px); } }

/* ---------- 通用排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: .08em;
  color: var(--blue-600); text-transform: uppercase;
}
.eyebrow::before {
  content: ""; width: 22px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan));
}
.sec-title {
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.25; font-weight: 700; letter-spacing: -0.02em;
  margin: 14px 0 0;
}
.sec-desc {
  margin: 16px 0 0; color: var(--ink-3);
  font-size: 16px; max-width: 660px;
}
.sec-head { margin-bottom: 44px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head.center .eyebrow::before { display: none; }

section { padding: 96px 0; position: relative; }
@media (max-width: 720px) { section { padding: 64px 0; } }

.grad-text {
  background: linear-gradient(100deg, var(--blue-700) 0%, var(--blue-500) 42%, var(--cyan) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 26px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; transition: .22s ease; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(120deg, var(--blue-700), var(--blue-500));
  color: #fff; box-shadow: 0 8px 20px rgba(15, 79, 174, .26);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(15, 79, 174, .32); }
.btn-ghost { background: #fff; color: var(--blue-700); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--blue-500); color: var(--blue-600); transform: translateY(-2px); }
.btn-light { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.34); backdrop-filter: blur(6px); }
.btn-light:hover { background: rgba(255,255,255,.24); }
.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }

/* ==========================================================================
   导航
   ========================================================================== */
.nav {
  position: fixed; inset: 0 0 auto 0; height: var(--nav-h); z-index: 90;
  background: rgba(255,255,255,.86); backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent; transition: .28s ease;
}
.nav.scrolled { border-bottom-color: var(--line); box-shadow: 0 2px 16px rgba(14,23,38,.05); }
.nav-in { height: 100%; display: flex; align-items: center; gap: 28px; }
.nav-logo img { height: 30px; width: auto; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a {
  position: relative; padding: 9px 14px; font-size: 15px; font-weight: 500;
  color: var(--ink-2); border-radius: var(--r-sm); transition: .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--blue-700); background: var(--blue-50); }
.nav-cta { margin-left: 14px; }
.nav-toggle { display: none; margin-left: auto; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 10px; background: #fff; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 2px; margin: 4px auto; background: var(--ink-2); border-radius: 2px; transition: .2s; }

@media (max-width: 1080px) {
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; padding: 14px 20px 24px; border-bottom: 1px solid var(--line);
    box-shadow: var(--sh-md); transform: translateY(-140%); transition: .3s ease;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 12px 10px; font-size: 16px; }
  .nav-toggle { display: block; }
  .nav-cta { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative; overflow: hidden;
  padding: calc(var(--nav-h) + 84px) 0 0;
  background:
    radial-gradient(1100px 520px at 78% -8%, rgba(41,171,226,.16), transparent 62%),
    radial-gradient(820px 460px at 4% 4%, rgba(124,194,67,.12), transparent 60%),
    radial-gradient(760px 420px at 46% 96%, rgba(245,166,35,.10), transparent 62%),
    linear-gradient(180deg, #fbfdff 0%, #ffffff 74%);
}
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--line-2) 1px, transparent 1px), linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(760px 420px at 50% 26%, #000 12%, transparent 78%);
  -webkit-mask-image: radial-gradient(760px 420px at 50% 26%, #000 12%, transparent 78%);
  opacity: .8;
}
.hero-in { position: relative; z-index: 2; display: grid; grid-template-columns: minmax(0,1.06fr) minmax(0,.94fr); gap: 56px; align-items: center; }
@media (max-width: 1000px) { .hero-in { grid-template-columns: 1fr; gap: 40px; } }

.hero h1 {
  margin: 18px 0 0;
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.14; font-weight: 800; letter-spacing: -0.03em;
}
.hero-sub { margin: 22px 0 0; font-size: clamp(15px, 1.5vw, 18px); color: var(--ink-3); max-width: 600px; }
.hero-sub b { color: var(--ink); font-weight: 600; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--ink-4); }

.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }
.badge {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 13px; border-radius: 999px; font-size: 13px; font-weight: 500;
  color: var(--ink-2); background: #fff; border: 1px solid var(--line); box-shadow: var(--sh-sm);
}
.badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }

/* hero 右侧数据卡 */
.kpi-card {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-xl); padding: 26px; box-shadow: var(--sh-lg); overflow: hidden;
}
.kpi-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 4px;
  background: linear-gradient(90deg, var(--blue-700), var(--cyan) 45%, var(--green) 78%, var(--orange));
}
.kpi-card-h { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.kpi-card-h h3 { margin: 0; font-size: 15px; font-weight: 600; color: var(--ink-2); }
.kpi-live { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--ink-4); }
.kpi-live i { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(124,194,67,.16); animation: pulse 2.2s infinite; }
@keyframes pulse { 0%,100% { opacity: 1 } 50% { opacity: .35 } }

.kpi-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--line-2); border-radius: var(--r-md); overflow: hidden; margin-top: 16px; }
.kpi-cell { background: #fff; padding: 18px 16px; }
.kpi-cell .v { font-family: var(--font-num); font-size: 27px; font-weight: 700; letter-spacing: -0.02em; color: var(--blue-800); line-height: 1.15; }
.kpi-cell .v small { font-size: 14px; font-weight: 600; margin-left: 2px; color: var(--blue-600); }
.kpi-cell .l { margin-top: 5px; font-size: 12.5px; color: var(--ink-3); }

.kpi-bars { margin-top: 18px; display: grid; gap: 12px; }
.kpi-bar-row { display: grid; grid-template-columns: 76px 1fr 74px; align-items: center; gap: 10px; font-size: 12.5px; }
.kpi-bar-row .n { color: var(--ink-2); font-weight: 500; }
.kpi-bar { height: 8px; border-radius: 99px; background: var(--line-2); overflow: hidden; }
.kpi-bar span { display: block; height: 100%; border-radius: 99px; background: linear-gradient(90deg, var(--blue-600), var(--cyan)); width: 0; transition: width 1.2s cubic-bezier(.2,.7,.2,1); }
.kpi-bar-row .t { text-align: right; font-family: var(--font-num); color: var(--ink-3); font-weight: 600; }
.kpi-foot { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--ink-4); line-height: 1.6; }

/* 滚动数字条 */
.stat-strip { margin-top: 68px; border-top: 1px solid var(--line); position: relative; z-index: 2; }
.stat-strip-in { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat-item { padding: 30px 26px; border-right: 1px solid var(--line); }
.stat-item:last-child { border-right: 0; }
.stat-item .v { font-family: var(--font-num); font-size: clamp(26px, 3vw, 38px); font-weight: 700; color: var(--ink); letter-spacing: -0.03em; line-height: 1.1; }
.stat-item .v em { font-style: normal; color: var(--blue-600); }
.stat-item .l { margin-top: 8px; font-size: 13.5px; color: var(--ink-3); }
@media (max-width: 860px) {
  .stat-strip-in { grid-template-columns: 1fr 1fr; }
  .stat-item:nth-child(2n) { border-right: 0; }
  .stat-item { border-bottom: 1px solid var(--line); }
  .stat-item:nth-last-child(-n+2) { border-bottom: 0; }
}

/* ==========================================================================
   客户品牌墙（跑马灯）
   ========================================================================== */
.clients { padding: 56px 0; background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.clients-h { text-align: center; font-size: 13.5px; color: var(--ink-4); letter-spacing: .04em; margin-bottom: 26px; }
.marquee { overflow: hidden; position: relative; mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 9%, #000 91%, transparent); }
.marquee + .marquee { margin-top: 16px; }
.marquee-track { display: flex; gap: 14px; width: max-content; animation: slide 46s linear infinite; }
.marquee-track.rev { animation-direction: reverse; animation-duration: 56s; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes slide { from { transform: translateX(0) } to { transform: translateX(-50%) } }
.chip {
  flex: none; padding: 12px 22px; background: #fff; border: 1px solid var(--line);
  border-radius: 999px; font-size: 14.5px; font-weight: 500; color: var(--ink-2);
  white-space: nowrap; box-shadow: var(--sh-sm);
}
.chip.brand { color: var(--blue-800); border-color: #d5e3f8; background: linear-gradient(180deg, #fff, var(--blue-50)); font-weight: 600; }

/* ==========================================================================
   服务体系（三层）
   ========================================================================== */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 980px) { .svc-grid { grid-template-columns: 1fr; } }
.svc {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 30px 26px 28px; box-shadow: var(--sh-sm);
  transition: .3s ease; overflow: hidden;
}
.svc::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 3px;
  background: linear-gradient(90deg, var(--blue-600), var(--cyan));
  transform: scaleX(0); transform-origin: left; transition: .4s ease;
}
.svc:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); border-color: #d6e3f7; }
.svc:hover::after { transform: scaleX(1); }
.svc-no { font-family: var(--font-num); font-size: 13px; font-weight: 700; letter-spacing: .12em; color: var(--ink-4); }
.svc h3 { margin: 14px 0 0; font-size: 21px; font-weight: 700; letter-spacing: -0.01em; }
.svc-tag { display: inline-block; margin-top: 10px; font-size: 12.5px; color: var(--blue-600); background: var(--blue-50); border: 1px solid #dbe8fa; padding: 3px 10px; border-radius: 99px; }
.svc p { margin: 16px 0 0; color: var(--ink-3); font-size: 14.5px; }
.svc ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 9px; }
.svc li { position: relative; padding-left: 20px; font-size: 14px; color: var(--ink-2); }
.svc li::before {
  content: ""; position: absolute; left: 4px; top: 9px; width: 6px; height: 6px;
  border-radius: 2px; background: var(--cyan);
}
.svc-icon {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-50), #e6f4fb); border: 1px solid #dbe8fa;
}
.svc-icon svg { width: 22px; height: 22px; }

/* ==========================================================================
   平台能力
   ========================================================================== */
.plat { background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%); }
.plat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
@media (max-width: 980px) { .plat-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .plat-grid { grid-template-columns: 1fr; } }
.plat-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 26px 22px; box-shadow: var(--sh-sm); transition: .3s;
}
.plat-card:hover { transform: translateY(-4px); box-shadow: var(--sh-md); }
.plat-card .dot { width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center; font-size: 17px; font-weight: 700; color: #fff; }
.plat-card h4 { margin: 16px 0 0; font-size: 17px; font-weight: 700; }
.plat-card p { margin: 8px 0 0; font-size: 13.5px; color: var(--ink-3); }
.plat-card .num { margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--line); font-size: 12.5px; color: var(--ink-3); }
.plat-card .num b { font-family: var(--font-num); font-size: 17px; color: var(--blue-800); }

/* ==========================================================================
   行业方案
   ========================================================================== */
.ind-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 1000px) { .ind-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 720px) { .ind-grid { grid-template-columns: repeat(2, 1fr); } }
.ind {
  position: relative; border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 22px 20px; background: #fff; transition: .26s; overflow: hidden;
}
.ind:hover { border-color: #cfdff7; background: var(--blue-50); transform: translateY(-3px); }
.ind h4 { margin: 0; font-size: 16px; font-weight: 700; }
.ind p { margin: 8px 0 0; font-size: 13px; color: var(--ink-3); line-height: 1.6; }
.ind .k { position: absolute; right: 14px; top: 12px; font-family: var(--font-num); font-size: 11px; color: var(--ink-4); }

/* ==========================================================================
   客户案例
   ========================================================================== */
.cases { background: var(--bg-soft); }
.case-filter { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.case-filter button {
  padding: 8px 17px; border-radius: 999px; border: 1px solid var(--line);
  background: #fff; color: var(--ink-2); font-size: 13.5px; font-weight: 500; cursor: pointer; transition: .2s;
}
.case-filter button:hover { border-color: var(--blue-500); color: var(--blue-700); }
.case-filter button.on { background: var(--blue-700); border-color: var(--blue-700); color: #fff; box-shadow: 0 6px 16px rgba(15,79,174,.24); }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 1000px) { .case-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 680px) { .case-grid { grid-template-columns: 1fr; } }
.case {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 24px 22px; display: flex; flex-direction: column; transition: .3s; box-shadow: var(--sh-sm);
}
.case:hover { transform: translateY(-5px); box-shadow: var(--sh-lg); border-color: #d6e3f7; }
.case-top { display: flex; align-items: flex-start; gap: 12px; }
.case-logo {
  flex: none; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-size: 17px; font-weight: 700; color: #fff; letter-spacing: -0.02em;
}
.case-name { font-size: 16px; font-weight: 700; line-height: 1.4; }
.case-cat { margin-top: 4px; font-size: 12px; color: var(--ink-4); }
.case-body { margin-top: 18px; }
.case-row { display: flex; align-items: baseline; justify-content: space-between; padding: 9px 0; border-bottom: 1px dashed var(--line-2); font-size: 13.5px; }
.case-row:last-child { border-bottom: 0; }
.case-row .k { color: var(--ink-3); }
.case-row .v { font-family: var(--font-num); font-weight: 700; color: var(--blue-800); }
.case-desc { margin: 14px 0 0; font-size: 13.5px; color: var(--ink-3); line-height: 1.7; }
.case-tags { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.case-tags span { font-size: 11.5px; color: var(--blue-600); background: var(--blue-50); border: 1px solid #e0ebfa; padding: 3px 9px; border-radius: 99px; }
.case-note { margin-top: 30px; font-size: 12.5px; color: var(--ink-4); line-height: 1.7; text-align: center; }

/* ==========================================================================
   数据看板
   ========================================================================== */
.dash-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 22px; }
@media (max-width: 980px) { .dash-grid { grid-template-columns: 1fr; } }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px; box-shadow: var(--sh-sm); }
.panel-h { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 22px; }
.panel-h h3 { margin: 0; font-size: 16.5px; font-weight: 700; }
.panel-h span { font-size: 12px; color: var(--ink-4); }

.bars { display: grid; gap: 16px; }
.bar-item .top { display: flex; justify-content: space-between; align-items: baseline; font-size: 14px; margin-bottom: 7px; }
.bar-item .top b { font-family: var(--font-num); font-size: 15px; color: var(--blue-800); }
.bar-item .top em { font-style: normal; color: var(--ink-3); font-size: 12.5px; }
.bar-track { height: 10px; border-radius: 99px; background: var(--line-2); overflow: hidden; }
.bar-fill { height: 100%; border-radius: 99px; width: 0; transition: width 1.3s cubic-bezier(.2,.7,.2,1); }

.year-list { display: grid; gap: 0; }
.year-row { display: grid; grid-template-columns: 62px 1fr; gap: 14px; align-items: center; padding: 14px 0; border-bottom: 1px dashed var(--line); }
.year-row:last-child { border-bottom: 0; }
.year-row .y { font-family: var(--font-num); font-size: 15px; font-weight: 700; color: var(--ink-2); }
.year-row .col { display: grid; gap: 7px; }
.mini { display: grid; grid-template-columns: 72px 1fr 92px; gap: 10px; align-items: center; font-size: 12px; }
.mini .t { color: var(--ink-3); }
.mini .bar { height: 7px; border-radius: 99px; background: var(--line-2); overflow: hidden; }
.mini .bar i { display: block; height: 100%; border-radius: 99px; width: 0; transition: width 1.2s cubic-bezier(.2,.7,.2,1); }
.mini .n { text-align: right; font-family: var(--font-num); font-weight: 700; color: var(--ink-2); }

.donut-wrap { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.donut { width: 168px; height: 168px; flex: none; }
.donut circle { fill: none; stroke-width: 22; transition: stroke-dasharray 1.2s cubic-bezier(.2,.7,.2,1); }
.legend { display: grid; gap: 11px; flex: 1; min-width: 170px; }
.legend-item { display: flex; align-items: center; gap: 10px; font-size: 13.5px; }
.legend-item i { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.legend-item .n { color: var(--ink-2); }
.legend-item .v { margin-left: auto; font-family: var(--font-num); font-weight: 700; color: var(--ink); }

/* ==========================================================================
   研究院 / 文章
   ========================================================================== */
.res-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 1000px) { .res-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 680px) { .res-grid { grid-template-columns: 1fr; } }
.art {
  display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); overflow: hidden; transition: .3s; box-shadow: var(--sh-sm); height: 100%;
}
.art:hover { transform: translateY(-5px); box-shadow: var(--sh-lg); border-color: #d6e3f7; }
.art-cover { height: 132px; position: relative; overflow: hidden; }
.art-cover span { position: absolute; inset: 0; display: grid; place-items: center; font-size: 40px; font-weight: 800; color: rgba(255,255,255,.9); letter-spacing: -0.04em; }
.art-body { padding: 20px 20px 22px; display: flex; flex-direction: column; flex: 1; }
.art-cat { font-size: 11.5px; font-weight: 600; color: var(--blue-600); letter-spacing: .06em; }
.art h4 { margin: 10px 0 0; font-size: 16.5px; font-weight: 700; line-height: 1.45; }
.art p { margin: 12px 0 0; font-size: 13.5px; color: var(--ink-3); flex: 1; }
.art-meta { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line-2); display: flex; justify-content: space-between; font-size: 12px; color: var(--ink-4); }
.art-more { color: var(--blue-600); font-weight: 600; }

/* ==========================================================================
   服务承诺 / 客户反馈
   ========================================================================== */
.promise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 900px) { .promise-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .promise-grid { grid-template-columns: 1fr; } }
.promise { border: 1px solid var(--line); border-radius: var(--r-md); padding: 22px; background: #fff; }
.promise h4 { margin: 12px 0 0; font-size: 16px; font-weight: 700; }
.promise p { margin: 8px 0 0; font-size: 13.5px; color: var(--ink-3); }
.promise .ok { width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center; background: #eef8f2; border: 1px solid #d8efe3; }

.voice-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 980px) { .voice-grid { grid-template-columns: 1fr; } }
.voice { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 26px 24px; box-shadow: var(--sh-sm); }
.voice .q { font-size: 26px; line-height: 1; color: var(--blue-500); font-weight: 800; font-family: var(--font-num); }
.voice p { margin: 14px 0 0; font-size: 14.5px; color: var(--ink-2); }
.voice .who { margin-top: 20px; padding-top: 16px; border-top: 1px dashed var(--line); }
.voice .who b { display: block; font-size: 14.5px; }
.voice .who span { font-size: 12.5px; color: var(--ink-4); }

/* ==========================================================================
   CTA / 联系表单
   ========================================================================== */
.cta {
  position: relative; overflow: hidden; border-radius: var(--r-xl);
  background: linear-gradient(120deg, #062a63 0%, #0f4fae 52%, #1a6fc4 100%);
  padding: 54px 50px; color: #fff;
}
.cta::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(600px 300px at 88% 10%, rgba(41,171,226,.4), transparent 62%),
              radial-gradient(500px 280px at 8% 96%, rgba(124,194,67,.28), transparent 62%);
}
.cta-in { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: start; }
@media (max-width: 940px) { .cta-in { grid-template-columns: 1fr; gap: 30px; } .cta { padding: 40px 26px; } }
.cta h2 { margin: 12px 0 0; font-size: clamp(25px, 3.2vw, 36px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.25; }
.cta p { margin: 18px 0 0; color: rgba(255,255,255,.78); font-size: 15px; }
.cta .eyebrow { color: var(--amber); }
.cta .eyebrow::before { background: linear-gradient(90deg, var(--amber), var(--green)); }
.cta-list { margin: 26px 0 0; padding: 0; list-style: none; display: grid; gap: 11px; }
.cta-list li { position: relative; padding-left: 24px; font-size: 14.5px; color: rgba(255,255,255,.86); }
.cta-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 700;
}
.form-card { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.18); border-radius: var(--r-lg); padding: 26px; backdrop-filter: blur(10px); }
.form-card h4 { margin: 0 0 4px; font-size: 17px; font-weight: 700; }
.form-card .hint { font-size: 12.5px; color: rgba(255,255,255,.6); margin-bottom: 18px; }
.field { margin-bottom: 12px; }
.field label { display: block; font-size: 12.5px; color: rgba(255,255,255,.72); margin-bottom: 6px; }
.field input, .field select, .field textarea {
  width: 100%; background: rgba(255,255,255,.94); border: 1px solid transparent;
  border-radius: 10px; padding: 11px 13px; font-size: 14px; color: var(--ink); font-family: inherit;
  outline: none; transition: .2s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--cyan); box-shadow: 0 0 0 3px rgba(41,171,226,.28); }
.field textarea { resize: vertical; min-height: 76px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 560px) { .form-row { grid-template-columns: 1fr; } }
.form-card .btn { width: 100%; margin-top: 6px; background: #fff; color: var(--blue-800); }
.form-card .btn:hover { background: #f0f6ff; }
.form-ok { display: none; margin-top: 12px; font-size: 13px; color: var(--green); }
.form-ok.is-err { color: #d93025; }
/* 蜜罐字段：移出视口而非 display:none —— 部分机器人会跳过 display:none 的元素 */
.hp { position: absolute !important; left: -9999em !important; top: auto; width: 1px; height: 1px; overflow: hidden; }
.form-card .btn[disabled] { opacity: .62; cursor: not-allowed; }

/* ==========================================================================
   页脚
   ========================================================================== */
.foot { background: #061a3c; color: rgba(255,255,255,.68); padding: 66px 0 0; }
.foot-in { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; }
@media (max-width: 900px) { .foot-in { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .foot-in { grid-template-columns: 1fr; } }
.foot-brand img { height: 32px; margin-bottom: 18px; filter: brightness(0) invert(1); }
.foot-brand p { font-size: 13px; line-height: 1.8; margin: 0; }
.foot h5 { color: #fff; font-size: 14px; font-weight: 600; margin: 0 0 16px; }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.foot ul a { font-size: 13px; transition: .2s; }
.foot ul a:hover { color: #fff; }
.foot-bottom { margin-top: 52px; border-top: 1px solid rgba(255,255,255,.12); padding: 22px 0; display: flex; flex-wrap: wrap; gap: 10px 22px; justify-content: space-between; font-size: 12.5px; color: rgba(255,255,255,.48); }
.foot-icp { padding: 0 0 26px; text-align: center; font-size: 12.5px; line-height: 1.6; color: rgba(255,255,255,.5); }
.foot-icp a { color: rgba(255,255,255,.7); text-decoration: none; transition: .2s; }
.foot-icp a:hover { color: #fff; }

/* 回到顶部 */
.to-top {
  position: fixed; right: 24px; bottom: 26px; width: 46px; height: 46px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line); box-shadow: var(--sh-md); cursor: pointer;
  display: grid; place-items: center; opacity: 0; pointer-events: none; transition: .28s; z-index: 80;
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-3px); border-color: var(--blue-500); }

/* 滚动入场 */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }

/* ==========================================================================
   研究院子页面
   ========================================================================== */
.page-hero {
  padding: calc(var(--nav-h) + 70px) 0 54px;
  background: radial-gradient(900px 400px at 82% -10%, rgba(41,171,226,.16), transparent 62%), linear-gradient(180deg, #fbfdff, #fff);
  border-bottom: 1px solid var(--line);
}
.crumb { font-size: 13px; color: var(--ink-4); margin-bottom: 14px; }
.crumb a:hover { color: var(--blue-600); }
.layout { display: grid; grid-template-columns: 268px minmax(0,1fr); gap: 44px; align-items: start; }
@media (max-width: 980px) { .layout { grid-template-columns: 1fr; gap: 26px; } }
.side { position: sticky; top: calc(var(--nav-h) + 24px); }
.side-h { font-size: 12px; letter-spacing: .1em; color: var(--ink-4); text-transform: uppercase; margin-bottom: 12px; }
.side-list { display: grid; gap: 6px; }
.side-list button {
  text-align: left; background: #fff; border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 14px; cursor: pointer; transition: .2s; font-size: 13.5px; color: var(--ink-2);
  line-height: 1.5;
}
.side-list button:hover { border-color: var(--blue-500); color: var(--blue-700); }
.side-list button.on { background: var(--blue-700); border-color: var(--blue-700); color: #fff; box-shadow: 0 8px 20px rgba(15,79,174,.22); }
.side-list button small { display: block; font-size: 11px; opacity: .7; margin-top: 3px; }

.doc { background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg); padding: 44px 46px; box-shadow: var(--sh-sm); }
@media (max-width: 720px) { .doc { padding: 28px 20px; } }
.doc h1 { font-size: clamp(23px, 3vw, 31px); line-height: 1.32; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 14px; }
.doc .meta { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 12.5px; color: var(--ink-4); padding-bottom: 22px; border-bottom: 1px solid var(--line-2); }
.doc .meta span.tag { color: var(--blue-600); background: var(--blue-50); border: 1px solid #e0ebfa; padding: 2px 9px; border-radius: 99px; }
.doc h2 { font-size: 20px; font-weight: 700; margin: 38px 0 14px; padding-left: 14px; border-left: 4px solid var(--blue-600); line-height: 1.45; }
.doc h3 { font-size: 16.5px; font-weight: 700; margin: 26px 0 10px; color: var(--ink); }
.doc p { margin: 14px 0; font-size: 15px; color: var(--ink-2); line-height: 1.9; }
.doc ul, .doc ol { margin: 14px 0; padding-left: 22px; }
.doc li { font-size: 15px; color: var(--ink-2); line-height: 1.9; margin: 6px 0; }
.doc strong { color: var(--ink); font-weight: 700; }
.doc blockquote {
  margin: 22px 0; padding: 18px 22px; border-left: 4px solid var(--cyan);
  background: var(--blue-50); border-radius: 0 12px 12px 0; color: var(--ink-2); font-size: 14.5px;
}
.doc table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 13.5px; }
.doc th, .doc td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; }
.doc th { background: var(--bg-soft); font-weight: 600; color: var(--ink-2); }
.doc td.num { font-family: var(--font-num); }
.doc .tip {
  margin: 24px 0; padding: 18px 20px; border-radius: 12px;
  background: linear-gradient(180deg, #fffaf0, #fff); border: 1px solid #f6e6c8;
}
.doc .tip b { color: #a9701a; }


/* ==========================================================================
   第二轮修订：案例金额放大 / 联系方式 / 企业微信二维码
   ========================================================================== */

/* 案例卡片金额主体化（数字未做任何修改，仅放大视觉权重） */
.case-amount {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  margin: 0 0 10px; padding: 13px 15px; border-radius: 12px;
  background: linear-gradient(120deg, var(--blue-50), #f2f8ff);
  border: 1px solid #e0ebfa;
}
.case-amount .lbl { flex: none; font-size: 12px; color: var(--ink-3); line-height: 1.35; }
.case-amount .num {
  font-family: var(--font-num); font-size: 31px; font-weight: 800;
  letter-spacing: -0.035em; line-height: 1; color: var(--blue-800); white-space: nowrap;
}
.case-amount .num em { font-style: normal; font-size: 18px; font-weight: 700; color: var(--blue-600); margin-right: 1px; }
.case-amount .num small { font-size: 15px; font-weight: 700; color: var(--blue-600); margin-left: 2px; }
@media (max-width: 680px) { .case-amount .num { font-size: 27px; } }

/* 看板与 KPI 数值同步加权，保证「金额」是页面视觉主角 */
.kpi-cell .v { font-size: 30px; }
.plat-card .num b { font-size: 20px; }
.mini .n { font-size: 13.5px; }
.stat-item .v { font-weight: 800; }

/* 联系方式 */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 22px; }
@media (max-width: 1000px) { .contact-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 20px 18px; box-shadow: var(--sh-sm); transition: .26s;
}
.contact-item:hover { border-color: #cfdff7; transform: translateY(-3px); box-shadow: var(--sh-md); }
.ci-ico {
  flex: none; width: 38px; height: 38px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--blue-50), #e6f4fb); border: 1px solid #dbe8fa;
}
.ci-ico svg { width: 19px; height: 19px; }
.ci-k { font-size: 12px; color: var(--ink-4); letter-spacing: .02em; }
.ci-v { margin-top: 5px; font-size: 15.5px; font-weight: 700; color: var(--ink); line-height: 1.45; word-break: break-all; }
.ci-v a:hover { color: var(--blue-600); }
.ci-n { margin-top: 4px; font-size: 12px; color: var(--ink-4); line-height: 1.5; }

/* 企业微信二维码卡 */
.qr-card {
  margin-top: 22px; display: grid; grid-template-columns: 224px minmax(0, 1fr);
  gap: 34px; align-items: center;
  background: linear-gradient(120deg, #f8fbff, #ffffff 62%);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px 32px; box-shadow: var(--sh-sm);
}
@media (max-width: 760px) {
  .qr-card { grid-template-columns: 1fr; gap: 22px; padding: 24px 20px; justify-items: center; text-align: center; }
}
.qr-box {
  width: 224px; height: 224px; border-radius: var(--r-md); background: #fff;
  border: 1px solid var(--line); box-shadow: var(--sh-sm);
  display: grid; place-items: center; overflow: hidden; padding: 10px;
}
.qr-box img { width: 100%; height: 100%; object-fit: contain; }
.qr-ph {
  width: 100%; height: 100%; border-radius: 10px; display: grid; place-content: center;
  gap: 10px; text-align: center; padding: 12px;
  background: repeating-linear-gradient(45deg, #f6f9fe 0 10px, #eef4fc 10px 20px);
  border: 1px dashed #c8dbf3;
}
.qr-ph span { font-size: 22px; font-weight: 800; color: var(--blue-600); letter-spacing: .04em; }
.qr-ph em { font-style: normal; font-size: 11.5px; line-height: 1.7; color: var(--ink-4); }
.qr-txt h4 { margin: 0; font-size: 21px; font-weight: 800; letter-spacing: -0.01em; line-height: 1.4; }
.qr-txt p { margin: 12px 0 0; font-size: 14.5px; color: var(--ink-3); }
.qr-txt ul { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.qr-txt li { position: relative; padding-left: 20px; font-size: 13.5px; color: var(--ink-2); }
.qr-txt li::before { content: ""; position: absolute; left: 4px; top: 8px; width: 6px; height: 6px; border-radius: 2px; background: var(--cyan); }

/* ==========================================================================
   员工身份核验（防冒名）
   ========================================================================== */
.verify-box {
  display: grid; grid-template-columns: 1.06fr .94fr; gap: 48px; align-items: center;
  background: linear-gradient(135deg, var(--blue-50) 0%, #fff 48%, var(--bg-soft-2) 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: 50px 48px;
  box-shadow: var(--sh-sm);
}
.verify-copy .sec-title { font-size: 31px; line-height: 1.34; margin: 12px 0 14px; }
.verify-copy .sec-desc { font-size: 14.5px; line-height: 1.8; color: var(--ink-3); }

.verify-points { margin: 20px 0 0; padding: 0; list-style: none; }
.verify-points li {
  position: relative; padding-left: 22px; margin-bottom: 11px;
  font-size: 13.5px; line-height: 1.72; color: var(--ink-3);
}
.verify-points li::before {
  content: ""; position: absolute; left: 0; top: 7px;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--blue-600); box-shadow: 0 0 0 3px rgba(22, 87, 176, .13);
}
.verify-points b { color: var(--ink); font-weight: 700; }

.verify-panel {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-lg); padding: 26px;
  box-shadow: var(--sh-md);
}
.verify-form label {
  display: block; font-size: 12.5px; font-weight: 700;
  color: var(--ink-2); margin-bottom: 8px;
}
.verify-row { display: flex; gap: 10px; }
.verify-row input {
  flex: 1; min-width: 0;
  background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 14px;
  font-size: 14.5px; color: var(--ink); font-family: inherit;
  outline: none; transition: .2s;
}
.verify-row input::placeholder { color: var(--ink-4); }
.verify-row input:focus {
  background: #fff; border-color: var(--blue-500);
  box-shadow: 0 0 0 3px rgba(31, 111, 208, .14);
}
.verify-row .btn { white-space: nowrap; padding: 12px 20px; }
.verify-row .btn[disabled] { opacity: .6; cursor: not-allowed; }

/* ---- 核验结果 ---- */
.verify-result { margin-top: 16px; }
.vr {
  display: flex; gap: 13px; align-items: flex-start;
  border: 1px solid; border-radius: var(--r-md);
  padding: 15px 16px; font-size: 13.5px; line-height: 1.62;
  animation: vrIn .28s ease;
}
@keyframes vrIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.vr-icon {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center;
  font-size: 14px; font-weight: 800; color: #fff;
}
.vr-main b { display: block; font-size: 15px; font-weight: 800; margin-bottom: 3px; }
.vr-main span { color: var(--ink-3); }
.vr-main .vr-full { font-style: normal; font-weight: 700; color: var(--warn); }

.vr-ok { background: #f2fbf6; border-color: #cbead9; }
.vr-ok .vr-icon { background: var(--ok); }
.vr-ok .vr-main b { color: #1d7a4e; }

.vr-warn { background: #fff8f0; border-color: #f6ddc0; }
.vr-warn .vr-icon { background: var(--warn); }
.vr-warn .vr-main b { color: #b5651d; }

.vr-no { background: var(--bg-soft); border-color: var(--line); }
.vr-no .vr-icon { background: var(--ink-4); }
.vr-no .vr-main b { color: var(--ink-2); }

.vr-err { background: #fdf3f3; border-color: #f3d2d2; }
.vr-err .vr-icon { background: var(--danger); }
.vr-err .vr-main b { color: #b33636; }

.vr-multi { margin: 8px 0 0; padding-left: 18px; }
.vr-multi li { margin-bottom: 4px; }

@media (max-width: 900px) {
  .verify-box { grid-template-columns: 1fr; gap: 30px; padding: 34px 24px; }
  .verify-copy .sec-title { font-size: 25px; }
}
@media (max-width: 520px) {
  .verify-row { flex-direction: column; }
  .verify-row .btn { width: 100%; }
}

/* ==========================================================================
   常见问题（FAQ）—— 用原生 <details> 实现，零脚本、内容可被搜索引擎抓取
   ========================================================================== */
.faq-list { display: grid; gap: 14px; max-width: 940px; margin: 0 auto; }
.faq {
  background: #fff; border: 1px solid var(--line);
  border-radius: var(--r-md); overflow: hidden; transition: .24s;
}
.faq:hover { border-color: #cfdcf0; box-shadow: var(--sh-sm); }
.faq[open] { border-color: #c3d7f2; box-shadow: var(--sh-md); }
.faq summary {
  position: relative; cursor: pointer; list-style: none;
  padding: 19px 54px 19px 22px;
  font-size: 15.5px; font-weight: 700; line-height: 1.55; color: var(--ink);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 23px; top: 50%;
  width: 9px; height: 9px; margin-top: -6px;
  border-right: 2px solid var(--blue-600); border-bottom: 2px solid var(--blue-600);
  transform: rotate(45deg); transition: .24s;
}
.faq[open] summary::after { transform: rotate(-135deg); margin-top: -2px; }
.faq-a { padding: 0 22px 20px; }
.faq-a p { margin: 0; font-size: 14px; line-height: 1.85; color: var(--ink-3); }
.faq-a b { color: var(--ink); font-weight: 700; }
.faq-a a { color: var(--blue-600); border-bottom: 1px solid rgba(22, 87, 176, .3); }
.faq-a a:hover { color: var(--blue-700); }