/* =========================================================
   询盘云 · 义乌  —  design system
   ========================================================= */
:root {
  --ink-900: #0d1117;
  --ink-800: #161b25;
  --ink-700: #222a38;
  --ink-600: #3a4454;
  --ink-500: #5a6577;
  --ink-400: #8b95a5;
  --ink-300: #c3cad4;
  --ink-200: #e3e7ed;
  --ink-100: #f1f4f8;
  --ink-50:  #f8fafc;

  --brand-900: #0a2f4d;
  --brand-800: #0d3f66;
  --brand-700: #10527f;
  --brand-600: #14699e;
  --brand-500: #1a82bf;
  --brand-400: #3fa0d8;
  --brand-300: #7bc0e8;
  --brand-100: #dceef9;
  --brand-50:  #f0f8fd;

  --accent-600: #d4610c;
  --accent-500: #f07818;
  --accent-400: #ffa04d;
  --accent-100: #ffe9d6;

  --wa: #25d366;

  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --shadow-sm: 0 1px 2px rgba(13,17,23,.06), 0 2px 8px rgba(13,17,23,.04);
  --shadow-md: 0 4px 12px rgba(13,17,23,.06), 0 12px 32px rgba(13,17,23,.06);
  --shadow-lg: 0 12px 28px rgba(13,17,23,.08), 0 32px 64px rgba(13,17,23,.08);

  --maxw: 1180px;
  --nav-h: 72px;

  --ease: cubic-bezier(.22,.61,.36,1);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
a { color: var(--brand-600); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--brand-500); }

h1, h2, h3, h4 {
  color: var(--ink-900);
  line-height: 1.28;
  margin: 0 0 .6em;
  font-weight: 700;
  letter-spacing: -.01em;
}
h1 { font-size: clamp(2rem, 4.2vw, 3.25rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.55rem, 2.6vw, 2.15rem); }
h3 { font-size: 1.2rem; }
h4 { font-size: 1.02rem; }

p { margin: 0 0 1.1em; }
p:last-child { margin-bottom: 0; }

ul, ol { margin: 0 0 1.1em; padding-left: 1.3em; }
li { margin-bottom: .42em; }
li:last-child { margin-bottom: 0; }

strong { color: var(--ink-900); font-weight: 600; }

::selection { background: var(--brand-100); color: var(--brand-900); }

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: 860px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-tint { background: var(--ink-50); }
.section-brand { background: linear-gradient(168deg, var(--brand-900) 0%, var(--brand-700) 58%, var(--brand-600) 100%); color: #dbe9f4; }
.section-brand h2, .section-brand h3, .section-brand h4 { color: #fff; }
.section-brand a { color: var(--brand-300); }
.section-brand a:hover { color: #fff; }

.grid { display: grid; gap: 24px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1.05fr .95fr; gap: 72px; align-items: center; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--ink-200); box-shadow: 0 1px 20px rgba(13,17,23,.05); }
.nav { display: flex; align-items: center; height: var(--nav-h); gap: 36px; }

.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-img { height: 40px; width: auto; display: block; }
/* 深色页脚上的官方 logo：加白色圆角底板保证可读 */
.logo.on-dark { background: #fff; border-radius: 10px; padding: 8px 12px; }
.logo.on-dark .logo-img { height: 34px; }

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links > li { position: relative; margin: 0; list-style: none; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: var(--r-sm);
  font-size: .93rem; color: var(--ink-600); font-weight: 500;
}
.nav-links a:hover { background: var(--ink-100); color: var(--ink-900); }
.nav-links a.active { color: var(--brand-600); }
.nav-links a.active::after {
  content: ''; display: block; height: 2px; border-radius: 2px;
  background: var(--brand-500); margin: 5px auto -6px; width: 18px;
}

.nav-cta { display: flex; align-items: center; gap: 12px; margin-left: 8px; }
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 0; background: none; cursor: pointer;
  align-items: center; justify-content: center; border-radius: var(--r-sm);
}
.nav-toggle:hover { background: var(--ink-100); }
.nav-toggle span { display: block; width: 20px; height: 1.8px; background: var(--ink-800); border-radius: 2px; position: relative; }
.nav-toggle span::before, .nav-toggle span::after {
  content: ''; position: absolute; left: 0; width: 20px; height: 1.8px; background: var(--ink-800); border-radius: 2px;
  transition: transform .3s var(--ease), opacity .2s;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: rotate(45deg) translate(4px, 4px); }
.nav-open .nav-toggle span::after { transform: rotate(-45deg) translate(4px, -4px); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px;
  font-size: .95rem; font-weight: 600; font-family: inherit;
  border: 1px solid transparent; cursor: pointer;
  transition: all .22s var(--ease);
  white-space: nowrap;
}
.btn-primary { background: var(--brand-600); color: #fff; box-shadow: 0 1px 2px rgba(20,105,158,.2), 0 6px 18px rgba(20,105,158,.22); }
.btn-primary:hover { background: var(--brand-700); color: #fff; transform: translateY(-1px); box-shadow: 0 2px 4px rgba(20,105,158,.24), 0 10px 26px rgba(20,105,158,.28); }
.btn-accent { background: var(--accent-500); color: #fff; box-shadow: 0 1px 2px rgba(212,97,12,.2), 0 6px 18px rgba(240,120,24,.26); }
.btn-accent:hover { background: var(--accent-600); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: var(--ink-800); border-color: var(--ink-200); }
.btn-ghost:hover { border-color: var(--ink-300); color: var(--ink-900); background: var(--ink-50); }
.btn-outline-light { background: rgba(255,255,255,.06); color: #fff; border-color: rgba(255,255,255,.28); }
.btn-outline-light:hover { background: rgba(255,255,255,.14); color: #fff; border-color: rgba(255,255,255,.5); }
.btn-sm { padding: 9px 18px; font-size: .88rem; }
.btn-lg { padding: 15px 32px; font-size: 1rem; }

.link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; font-size: .93rem; }
.link-arrow svg { transition: transform .22s var(--ease); }
.link-arrow:hover svg { transform: translateX(3px); }

/* ---------- hero ---------- */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(165deg, #071e30 0%, #0a2f4d 40%, #10527f 78%, #14699e 100%);
  color: #cfe3f1;
  padding: 104px 0 112px;
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(58% 62% at 82% 12%, rgba(63,160,216,.30) 0%, rgba(63,160,216,0) 62%),
    radial-gradient(46% 50% at 6% 92%, rgba(240,120,24,.16) 0%, rgba(240,120,24,0) 68%);
}
.hero::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(rgba(255,255,255,.036) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.036) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(70% 60% at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000 0%, transparent 78%);
}
.hero .wrap { position: relative; z-index: 2; }
.hero h1 { color: #fff; margin-bottom: 22px; }
.hero h1 .hl { color: var(--brand-300); }
.hero-lead { font-size: clamp(1.02rem, 1.5vw, 1.18rem); line-height: 1.8; color: #b9d3e6; max-width: 620px; margin-bottom: 34px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 52px; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .78rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  color: var(--brand-500); margin-bottom: 18px;
}
.eyebrow::before { content: ''; width: 22px; height: 2px; background: currentColor; border-radius: 2px; }
.hero .eyebrow { color: var(--brand-300); }
.eyebrow-light { color: var(--brand-300); }

.hero-stats { display: flex; flex-wrap: wrap; gap: 48px; padding-top: 30px; border-top: 1px solid rgba(255,255,255,.12); }
.hero-stat-num { font-size: 1.9rem; font-weight: 700; color: #fff; line-height: 1.1; letter-spacing: -.02em; }
.hero-stat-num small { font-size: .95rem; font-weight: 500; margin-left: 2px; color: #9fc2da; }
.hero-stat-label { font-size: .82rem; color: #8fadc4; margin-top: 6px; letter-spacing: .02em; }

/* ---------- cards ---------- */
.card {
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 30px; transition: all .26s var(--ease);
}
.card-hover:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--ink-300); }
.card-tint { background: var(--ink-50); border-color: transparent; }
.card h3 { margin-bottom: .5em; }
.card p { font-size: .93rem; color: var(--ink-500); }

.icon-box {
  width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-50); color: var(--brand-600); margin-bottom: 20px;
}
.icon-box svg { width: 22px; height: 22px; }
.icon-box.accent { background: var(--accent-100); color: var(--accent-600); }

.service-card {
  position: relative; display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-lg);
  padding: 34px 30px; transition: all .26s var(--ease); overflow: hidden;
}
.service-card::after {
  content: ''; position: absolute; left: 0; top: 0; height: 3px; width: 0;
  background: linear-gradient(90deg, var(--brand-500), var(--brand-300));
  transition: width .4s var(--ease);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--ink-300); }
.service-card:hover::after { width: 100%; }
.service-card h3 { font-size: 1.16rem; margin-bottom: 10px; }
.service-card p { font-size: .92rem; color: var(--ink-500); margin-bottom: 20px; }
.service-card ul { list-style: none; padding: 0; margin: 0 0 24px; font-size: .89rem; color: var(--ink-600); }
.service-card ul li { display: flex; gap: 9px; align-items: flex-start; margin-bottom: 9px; }
.service-card ul li::before {
  content: ''; flex-shrink: 0; width: 5px; height: 5px; border-radius: 50%;
  background: var(--brand-400); margin-top: 9px;
}
.service-card .card-foot { margin-top: auto; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.tag {
  font-size: .73rem; font-weight: 600; letter-spacing: .03em;
  padding: 3px 10px; border-radius: 999px;
  background: var(--brand-50); color: var(--brand-700);
}
.tag-accent { background: var(--accent-100); color: var(--accent-600); }
.tag-neutral { background: var(--ink-100); color: var(--ink-500); }

/* ---------- dot list ---------- */
.dot-list { list-style: none; padding: 0; margin: 0; font-size: .92rem; color: var(--ink-600); }
.dot-list li { display: flex; gap: 10px; align-items: flex-start; margin-bottom: 12px; line-height: 1.65; }
.dot-list li:last-child { margin-bottom: 0; }
.dot-list li::before {
  content: ''; flex-shrink: 0; width: 5px; height: 5px; border-radius: 50%;
  background: var(--brand-400); margin-top: 9px;
}
.dot-list.tight li { margin-bottom: 8px; }
.dot-list.on-brand li { color: #a9c6db; }
.dot-list.on-brand li::before { background: var(--brand-300); }

/* ---------- numbered mini list ---------- */
.mini-list { list-style: none; padding: 0; margin: 0; counter-reset: mini; }
.mini-list li {
  position: relative; padding-left: 34px; margin-bottom: 14px;
  font-size: .92rem; color: var(--ink-600);
}
.mini-list li::before {
  counter-increment: mini; content: counter(mini);
  position: absolute; left: 0; top: 1px;
  width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--brand-50); color: var(--brand-600);
  font-size: .72rem; font-weight: 700; font-family: var(--font-mono);
}

/* ---------- anchor sub-nav ---------- */
.subnav {
  position: sticky; top: var(--nav-h); z-index: 40;
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--ink-200);
}
.subnav ul {
  display: flex; gap: 4px; list-style: none; margin: 0; padding: 10px 0;
  overflow-x: auto; scrollbar-width: none;
}
.subnav ul::-webkit-scrollbar { display: none; }
.subnav a {
  display: block; white-space: nowrap; padding: 7px 14px; border-radius: 999px;
  font-size: .88rem; color: var(--ink-500); font-weight: 500;
}
.subnav a:hover { background: var(--ink-100); color: var(--ink-900); }

/* ---------- module grid (CRM) ---------- */
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.module {
  background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 26px 24px; transition: all .24s var(--ease);
}
.module:hover { border-color: var(--brand-300); box-shadow: var(--shadow-sm); }
.module h4 { font-size: 1rem; margin-bottom: 8px; display: flex; align-items: center; gap: 9px; }
.module h4 .idx {
  font-family: var(--font-mono); font-size: .7rem; font-weight: 600;
  color: var(--brand-500); background: var(--brand-50);
  padding: 2px 7px; border-radius: 4px; letter-spacing: .04em;
}
.module p { font-size: .88rem; color: var(--ink-500); margin-bottom: 0; }

/* ---------- compare columns ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 0; border: 1px solid var(--ink-200); border-radius: var(--r-md); overflow: hidden; }
.compare > div { padding: 32px 30px; }
.compare > div:first-child { background: var(--ink-50); border-right: 1px solid var(--ink-200); }
.compare h3 { font-size: 1.15rem; margin-bottom: 6px; }
.compare .sub { font-size: .82rem; color: var(--ink-400); margin-bottom: 20px; letter-spacing: .02em; }

/* ---------- metric strip ---------- */
.metric-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.metric {
  border-left: 2px solid var(--brand-300); padding: 4px 0 4px 20px;
}
.metric .v { font-size: 1.3rem; font-weight: 700; color: var(--brand-800); line-height: 1.3; }
.metric .k { font-size: .84rem; color: var(--ink-500); margin-top: 6px; }

/* ---------- quote block ---------- */
.pull-quote {
  border-left: 3px solid var(--brand-500); padding: 6px 0 6px 24px;
  font-size: 1.08rem; line-height: 1.85; color: var(--ink-700);
  margin: 0;
}
.pull-quote footer { font-size: .84rem; color: var(--ink-400); margin-top: 14px; }

/* ---------- floating side toolbar ---------- */
.side-bar { position: fixed; right: 18px; bottom: 18vh; z-index: 60;
  display: flex; flex-direction: column; gap: 10px; }
.side-btn { position: relative; width: 46px; height: 46px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: #fff; color: var(--brand-700); border: 1px solid var(--ink-200);
  box-shadow: var(--shadow-sm); cursor: pointer; padding: 0;
  transition: all .2s var(--ease); }
.side-btn:hover { background: var(--accent-500); color: #fff;
  border-color: var(--accent-500); transform: translateY(-2px); }
.side-btn svg { width: 20px; height: 20px; }
.side-btn::after { content: attr(data-tip);
  position: absolute; right: calc(100% + 10px); top: 50%; transform: translateY(-50%);
  background: var(--ink-900); color: #fff; font-size: .78rem; white-space: nowrap;
  padding: 6px 11px; border-radius: 7px; opacity: 0; pointer-events: none;
  transition: opacity .18s var(--ease); }
.side-btn:hover::after { opacity: 1; }

/* ---------- journey timeline (客户旅程时间轴) ---------- */
.jt-wrap { padding: 0; overflow: hidden; }
.jt-head { background: var(--brand-50); padding: 20px 28px; border-bottom: 1px solid var(--ink-200);
  font-size: .8rem; font-weight: 700; letter-spacing: .1em; color: var(--brand-700); }
.jt { position: relative; padding: 26px 24px; }
/* 竖向连线：对齐图标列中心（58 + 24 + 20） */
.jt::before { content: ''; position: absolute; left: 126px; top: 40px; bottom: 40px; width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent-300), var(--accent-500)); }
.jt-item { position: relative; display: grid; grid-template-columns: 58px 40px 1fr;
  gap: 0 24px; align-items: start; padding: 11px 0; }
.jt-time { text-align: right; padding-top: 4px; line-height: 1.35; }
.jt-time .t { display: block; font-size: .92rem; font-weight: 700; color: var(--ink-800); }
.jt-time .d { display: block; font-size: .72rem; color: var(--ink-400); font-family: var(--font-mono); }
.jt-dot { width: 40px; height: 40px; border-radius: 50%; background: var(--brand-500);
  display: flex; align-items: center; justify-content: center; position: relative; z-index: 1;
  box-shadow: 0 0 0 4px #fff; }
.jt-dot svg { width: 19px; height: 19px; stroke: #fff; }
.jt-dot.is-accent { background: var(--accent-500); }
.jt-body { background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 13px 18px; box-shadow: 0 1px 2px rgba(13,17,23,.03); }
.jt-body .jt-title { font-size: .95rem; font-weight: 700; color: var(--ink-900); }
.jt-body .jt-meta { font-size: .78rem; color: var(--brand-600); margin-left: 8px; }
.jt-body p { margin: 5px 0 0; font-size: .86rem; color: var(--ink-500); line-height: 1.6; }
.jt-foot { padding: 20px 28px 24px; border-top: 1px solid var(--ink-200);
  font-size: .88rem; color: var(--ink-500); background: var(--ink-50); }

@media (max-width: 860px) {
  .jt { padding: 20px 16px; }
  .jt-item { grid-template-columns: 48px 34px 1fr; gap: 0 14px; padding: 10px 0; }
  .jt::before { left: 95px; }
  .jt-dot { width: 34px; height: 34px; box-shadow: 0 0 0 3px #fff; }
  .jt-dot svg { width: 16px; height: 16px; }
  .jt-time .t { font-size: .82rem; }
  .jt-body { padding: 12px 14px; }
  .jt-body .jt-meta { display: block; margin: 3px 0 0; }
}

/* ---------- hero grid（左文右卖点卡） ---------- */
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 56px; align-items: center; }
.hero-side { background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--r-lg); padding: 30px 30px 28px; backdrop-filter: blur(8px); }

/* ---------- hero checks（右侧卖点卡内，竖排） ---------- */
.hero-checks { display: flex; flex-direction: column; gap: 16px; margin-top: 0; }
.hero-checks span { display: flex; align-items: flex-start; gap: 10px;
  font-size: .92rem; line-height: 1.55; color: #e2eef7; }
.hero-checks svg { width: 17px; height: 17px; stroke: var(--accent-400); flex-shrink: 0; margin-top: 3px; }
.hero-cover { margin-top: 22px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.16);
  font-size: .88rem; line-height: 1.7; color: #a9c6db; }
.hero-cover b { color: #fff; font-weight: 600; }

/* ---------- pain cards（三个常见卡点） ---------- */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pain-card { background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 30px 28px; display: flex; flex-direction: column; transition: all .24s var(--ease); }
.pain-card:hover { border-color: var(--brand-300); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.pain-num { font-family: var(--font-mono); font-size: .78rem; font-weight: 700;
  color: var(--accent-500); letter-spacing: .08em; margin-bottom: 16px; }
.pain-card h3 { font-size: 1.08rem; margin-bottom: 12px; color: var(--ink-900); }
.pain-card p { font-size: .9rem; color: var(--ink-600); line-height: 1.75; flex: 1; }
.pain-card .pain-link { margin-top: 20px; font-size: .88rem; font-weight: 600;
  color: var(--brand-600); display: inline-flex; align-items: center; gap: 6px; }
.pain-card .pain-link:hover { color: var(--brand-800); }

/* ---------- why list（为什么是询盘云） ---------- */
.why-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin-top: 34px; }
.why-item { display: flex; gap: 14px; background: #fff; border: 1px solid var(--ink-200);
  border-radius: var(--r-md); padding: 22px 24px; }
.why-item .why-ico { flex-shrink: 0; width: 38px; height: 38px; border-radius: 10px;
  background: var(--brand-50); color: var(--brand-600);
  display: flex; align-items: center; justify-content: center; }
.why-item .why-ico svg { width: 19px; height: 19px; stroke: currentColor; }
.why-item h4 { font-size: .98rem; color: var(--ink-900); margin-bottom: 6px; }
.why-item p { font-size: .88rem; color: var(--ink-600); line-height: 1.7; margin: 0; }

/* ---------- AI 五步闭环（浅色步骤带） ---------- */
.ai5 { padding: 8px 0; color: var(--ink-600); }
.ai5 .eyebrow { color: var(--brand-600); }
.ai5-note b { color: var(--brand-600); font-weight: 600; }
.ai5 h2 { color: var(--ink-900); }
.ai5 .ai5-sub { font-size: .98rem; color: var(--ink-500); max-width: 620px; margin-top: 16px; line-height: 1.8; }
.ai5-track { position: relative; display: grid; grid-template-columns: repeat(5, 1fr);
  gap: 18px; margin: 52px 0 0; }
.ai5-track::before { content: ''; position: absolute; left: 10%; right: 10%; top: 34px;
  height: 2px; background: var(--ink-200); }
.ai5-step { position: relative; text-align: center; }
.ai5-num { width: 68px; height: 68px; margin: 0 auto; border-radius: 50%;
  background: var(--brand-50); border: 2px solid var(--accent-500);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 1.15rem; font-weight: 700; color: var(--accent-500);
  position: relative; z-index: 1; box-shadow: 0 0 0 6px #fff; transition: all .2s var(--ease); }
.ai5-step:hover .ai5-num { background: var(--accent-500); color: #fff; }
.ai5-label { margin-top: 14px; }
.ai5-label .t { display: inline-block; background: #fff; color: var(--ink-900);
  border: 1px solid var(--ink-200);
  font-size: .86rem; font-weight: 600; padding: 6px 14px; border-radius: 999px; }
.ai5-label .d { display: block; margin-top: 10px; font-size: .8rem; color: var(--ink-400); line-height: 1.6; }
.ai5-note { margin-top: 48px; text-align: center; font-size: .92rem; line-height: 1.9;
  color: var(--ink-500); max-width: 720px; margin-left: auto; margin-right: auto; }

/* ---------- step cards（五步闭环卡） ---------- */
.step-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.step-card { background: #fff; border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 28px 26px; transition: all .24s var(--ease); position: relative; }
.step-card:hover { border-color: var(--brand-300); box-shadow: var(--shadow-sm); }
.step-card .sc-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.step-card .sc-num { width: 40px; height: 40px; border-radius: 10px; flex-shrink: 0;
  background: var(--brand-50); color: var(--brand-700); border: 1px solid var(--brand-200);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .86rem; font-weight: 700; }
.step-card h3 { font-size: 1.06rem; margin: 0; }
.step-card p { font-size: .9rem; color: var(--ink-600); line-height: 1.75; margin: 0; }
.step-card.is-full { grid-column: 1 / -1; background: var(--brand-50); border-color: var(--brand-200); }
.step-card.is-full .sc-num { background: var(--accent-500); color: #fff; border-color: var(--accent-500); }

/* ---------- logic flow（开发信生成逻辑） ---------- */
.logic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.logic-item { border: 1px solid var(--ink-200); border-radius: var(--r-md); padding: 24px 22px;
  background: #fff; position: relative; }
.logic-item::after { content: '+' ; position: absolute; right: -14px; top: 50%;
  transform: translateY(-50%); font-size: 1.1rem; color: var(--brand-300); font-weight: 700; }
.logic-item:last-child::after { content: none; }
.logic-item h4 { font-size: .95rem; color: var(--brand-700); margin-bottom: 8px; }
.logic-item p { font-size: .86rem; color: var(--ink-500); line-height: 1.7; margin: 0; }

/* ---------- three things（你只需要做三件事） ---------- */
.three-things { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 26px; }
.thing { border-left: 2px solid var(--brand-300); padding-left: 18px; }
.thing .n { font-family: var(--font-mono); font-size: .74rem; color: var(--brand-500); font-weight: 700; }
.thing p { font-size: .92rem; color: var(--ink-700); margin: 6px 0 0; line-height: 1.65; }

/* ---------- GEO: 新旧路径对比 ---------- */
.path-cmp { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.path-col { border: 1px solid var(--ink-200); border-radius: var(--r-md); padding: 28px 26px; background: #fff; }
.path-col.is-new { border-color: var(--brand-300); background: var(--brand-50); }
.path-col .pc-tag {
  display: inline-block; font-family: var(--font-mono); font-size: .7rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; padding: 3px 9px; border-radius: 4px;
  background: var(--ink-100); color: var(--ink-500); margin-bottom: 18px;
}
.path-col.is-new .pc-tag { background: var(--brand-600); color: #fff; }
.path-col h4 { font-size: 1rem; margin-bottom: 16px; color: var(--ink-800); }
.path-col.is-new h4 { color: var(--brand-900); }
.path-list { counter-reset: pc; list-style: none; padding: 0; margin: 0; }
.path-list li {
  counter-increment: pc; position: relative; padding-left: 32px;
  font-size: .9rem; color: var(--ink-600); line-height: 1.6; margin-bottom: 13px;
}
.path-list li:last-child { margin-bottom: 0; }
.path-list li::before {
  content: counter(pc); position: absolute; left: 0; top: 1px;
  width: 20px; height: 20px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: .68rem; font-weight: 700;
  background: var(--ink-100); color: var(--ink-500);
}
.path-col.is-new .path-list li { color: var(--brand-800); }
.path-col.is-new .path-list li::before { background: var(--brand-600); color: #fff; }

/* ---------- GEO: 四层优化模型 ---------- */
.layer-stack { display: grid; gap: 14px; }
.layer {
  display: grid; grid-template-columns: 118px 1fr; gap: 26px;
  border: 1px solid var(--ink-200); border-radius: var(--r-md);
  padding: 26px 28px; background: #fff; transition: all .26s var(--ease);
}
.layer:hover { border-color: var(--brand-300); box-shadow: var(--shadow-sm); }
.layer .ly-tag { display: flex; flex-direction: column; gap: 6px; }
.layer .ly-idx { font-family: var(--font-mono); font-size: .72rem; font-weight: 700; color: var(--brand-400); letter-spacing: .08em; }
.layer .ly-name {
  font-size: .78rem; font-weight: 700; letter-spacing: .04em;
  color: var(--brand-700); background: var(--brand-50);
  border-radius: 5px; padding: 3px 8px; align-self: flex-start;
}
.layer h4 { font-size: 1.02rem; margin: 0 0 8px; color: var(--ink-800); }
.layer p { font-size: .9rem; color: var(--ink-500); line-height: 1.75; margin: 0 0 10px; }
.layer p:last-child { margin-bottom: 0; }
.layer .ly-check {
  font-size: .82rem; color: var(--brand-700); background: var(--brand-50);
  border-left: 2px solid var(--brand-400); border-radius: 0 5px 5px 0;
  padding: 8px 12px; margin-top: 12px;
}
.layer.is-key { border-color: var(--brand-200); }
.layer.is-key .ly-name { background: var(--accent-100); color: var(--accent-600); }

/* ---------- GEO: 技术清单两栏 ---------- */
.tech-split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 24px; align-items: start; }
.tech-list { list-style: none; padding: 0; margin: 0; }
.tech-list li {
  display: grid; grid-template-columns: 22px 1fr; gap: 12px;
  padding: 15px 0; border-bottom: 1px dashed var(--ink-200);
  font-size: .9rem; color: var(--ink-600); line-height: 1.68;
}
.tech-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.tech-list li:first-child { padding-top: 0; }
.tech-list .tk {
  width: 20px; height: 20px; border-radius: 50%; margin-top: 2px;
  background: var(--brand-50); color: var(--brand-600);
  display: flex; align-items: center; justify-content: center;
  font-size: .6rem; font-weight: 700;
}
.tech-list b { color: var(--ink-800); font-weight: 600; }

/* ---------- section header ---------- */
.sec-head { max-width: 720px; margin-bottom: 52px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }
.sec-head p { font-size: 1.02rem; color: var(--ink-500); margin-top: -6px; }

/* ---------- steps ---------- */
.steps { counter-reset: step; display: grid; gap: 0; }
.step {
  position: relative; display: grid; grid-template-columns: 76px 1fr; gap: 26px;
  padding: 30px 0; border-top: 1px solid var(--ink-200);
}
.step:first-child { border-top: 0; }
.step-num {
  counter-increment: step;
  font-family: var(--font-mono); font-size: .95rem; font-weight: 600;
  color: var(--brand-500); letter-spacing: .05em;
}
.step-num::before { content: '0' counter(step); }
.step-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step-body p { font-size: .94rem; color: var(--ink-500); margin-bottom: 8px; }
.step-meta { font-size: .82rem; color: var(--ink-400); }

/* ---------- table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--ink-200); border-radius: var(--r-md); }
table.spec { width: 100%; border-collapse: collapse; font-size: .91rem; background: #fff; min-width: 560px; }
table.spec th, table.spec td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--ink-200); vertical-align: top; }
table.spec thead th { background: var(--ink-50); font-weight: 600; color: var(--ink-800); font-size: .86rem; letter-spacing: .02em; white-space: nowrap; }
table.spec tbody tr:last-child th, table.spec tbody tr:last-child td { border-bottom: 0; }
table.spec tbody th { font-weight: 500; color: var(--ink-600); background: #fff; width: 34%; }
table.spec tbody tr:hover { background: var(--brand-50); }
.yes { color: var(--brand-600); font-weight: 600; }
.no { color: var(--ink-300); }

/* ---------- callout ---------- */
.callout {
  display: grid; grid-template-columns: auto 1fr; gap: 16px;
  padding: 22px 26px; border-radius: var(--r-md);
  background: var(--brand-50); border: 1px solid var(--brand-100);
  font-size: .93rem; color: var(--brand-900);
}
.callout svg { width: 20px; height: 20px; color: var(--brand-500); margin-top: 3px; }
.callout strong { color: var(--brand-900); }
.callout.warn { background: #fff8f0; border-color: var(--accent-100); color: #7a3c05; }
.callout.warn svg { color: var(--accent-500); }

/* ---------- quote / proof ---------- */
.proof-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--ink-200); border: 1px solid var(--ink-200); border-radius: var(--r-md); overflow: hidden; }
.proof-cell { background: #fff; padding: 30px 24px; }
.proof-cell .n { font-size: 1.7rem; font-weight: 700; color: var(--brand-700); line-height: 1.1; letter-spacing: -.02em; }
.proof-cell .n small { font-size: .85rem; color: var(--ink-400); font-weight: 500; margin-left: 3px; }
.proof-cell .t { font-size: .85rem; color: var(--ink-500); margin-top: 8px; }

/* ---------- faq ---------- */
.faq-item { border-bottom: 1px solid var(--ink-200); }
.faq-item:first-child { border-top: 1px solid var(--ink-200); }
.faq-q {
  width: 100%; display: flex; align-items: flex-start; justify-content: space-between; gap: 24px;
  padding: 22px 0; background: none; border: 0; cursor: pointer; text-align: left;
  font-family: inherit; font-size: 1.01rem; font-weight: 600; color: var(--ink-900);
  transition: color .2s;
}
.faq-q:hover { color: var(--brand-600); }
.faq-q .chev { flex-shrink: 0; width: 20px; height: 20px; margin-top: 3px; color: var(--ink-400); transition: transform .3s var(--ease); }
.faq-item.open .faq-q .chev { transform: rotate(180deg); color: var(--brand-500); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq-a-inner { padding: 0 48px 24px 0; font-size: .94rem; color: var(--ink-500); }
.faq-a-inner p:last-child { margin-bottom: 0; }

/* ---------- cta band ---------- */
.cta-band {
  position: relative; overflow: hidden; border-radius: var(--r-xl);
  background: linear-gradient(135deg, #0a2f4d 0%, #10527f 62%, #1a82bf 100%);
  color: #cfe3f1; padding: 64px 56px;
}
.cta-band::before {
  content: ''; position: absolute; right: -60px; top: -80px; width: 380px; height: 380px;
  border-radius: 50%; background: radial-gradient(circle, rgba(63,160,216,.34) 0%, rgba(63,160,216,0) 70%);
}
.cta-band h2 { color: #fff; margin-bottom: 14px; }
.cta-band p { color: #b3cfe3; font-size: 1rem; margin-bottom: 30px; max-width: 560px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; position: relative; z-index: 1; }

/* ---------- contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.contact-item { display: flex; gap: 16px; padding: 22px 0; border-bottom: 1px solid var(--ink-200); }
.contact-item:last-child { border-bottom: 0; }
.contact-item .icon-box { margin-bottom: 0; width: 42px; height: 42px; flex-shrink: 0; }
.contact-label { font-size: .78rem; color: var(--ink-400); letter-spacing: .06em; text-transform: uppercase; margin-bottom: 4px; }
.contact-value { font-size: 1.02rem; color: var(--ink-900); font-weight: 500; line-height: 1.5; }
.contact-value .copy-btn {
  display: inline-flex; align-items: center; gap: 5px; margin-left: 8px;
  font-size: .76rem; color: var(--ink-400); cursor: pointer; background: none; border: 0;
  font-family: inherit; padding: 2px 6px; border-radius: 4px; transition: all .2s;
}
.contact-value .copy-btn:hover { background: var(--ink-100); color: var(--brand-600); }

.form-field { margin-bottom: 18px; }
.form-field label { display: block; font-size: .85rem; font-weight: 600; color: var(--ink-600); margin-bottom: 7px; }
.form-field input, .form-field textarea, .form-field select {
  width: 100%; padding: 12px 16px; border-radius: var(--r-sm);
  border: 1px solid var(--ink-200); background: #fff; font-family: inherit; font-size: .94rem; color: var(--ink-800);
  transition: border-color .2s, box-shadow .2s;
}
.form-field input:focus, .form-field textarea:focus, .form-field select:focus {
  outline: none; border-color: var(--brand-400); box-shadow: 0 0 0 3px rgba(26,130,191,.12);
}
.form-field textarea { resize: vertical; min-height: 100px; }
.form-note { font-size: .8rem; color: var(--ink-400); margin-top: 12px; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink-900); color: #8b95a5; padding: 68px 0 0; font-size: .89rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; }
.site-footer h4 { color: #fff; font-size: .84rem; letter-spacing: .08em; text-transform: uppercase; margin-bottom: 18px; font-weight: 600; }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 11px; }
.site-footer a { color: #8b95a5; }
.site-footer a:hover { color: #fff; }
.footer-desc { margin-top: 20px; line-height: 1.8; color: #6b7686; max-width: 300px; }

/* 页脚品牌区：白字版 logo 主标 + 副标题 + 竖色条 + 标语 */
.fb-logo { display: flex; align-items: center; gap: 16px; }
.fb-mark { display: flex; flex-direction: column; gap: 7px; }
.fb-mark img { width: 145px; height: 32px; display: block; }
.fb-sub {
  font-size: .74rem; font-weight: 600; letter-spacing: .34em;
  color: #cfd8e3; white-space: nowrap;
}
.fb-bar { width: 3px; height: 44px; border-radius: 2px;
  background: linear-gradient(180deg, var(--accent-500), var(--brand-300)); }
.footer-tagline { margin-top: 18px; font-size: .95rem; color: #9fb2c8; letter-spacing: .02em; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08); padding: 24px 0 32px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: .82rem; color: #5a6577;
}

/* ---------- breadcrumb / page hero ---------- */
.page-hero {
  position: relative; overflow: hidden;
  background: linear-gradient(165deg, #071e30 0%, #0a2f4d 52%, #10527f 100%);
  color: #cfe3f1; padding: 76px 0 84px;
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background-image: radial-gradient(54% 66% at 88% 18%, rgba(63,160,216,.26) 0%, rgba(63,160,216,0) 64%);
}
.page-hero .wrap { position: relative; z-index: 1; }
.page-hero h1 { color: #fff; margin-bottom: 18px; }
.page-hero p { color: #b3cfe3; font-size: 1.04rem; max-width: 660px; margin-bottom: 0; }
.page-hero strong { color: #fff; }
.hero-lead strong { color: #fff; }
.crumb { display: flex; gap: 8px; align-items: center; font-size: .82rem; color: #7a9cb5; margin-bottom: 20px; }
.crumb a { color: #7a9cb5; }
.crumb a:hover { color: #fff; }
.crumb span { color: #4d6f88; }

/* ---------- animate ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------- responsive ---------- */
@media (max-width: 1024px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .proof-row { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .split { gap: 48px; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .pain-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-side { max-width: 560px; }
  .step-cards { grid-template-columns: 1fr; }
  .logic-grid { grid-template-columns: 1fr; }
  .logic-item::after { content: none; }
  .three-things { grid-template-columns: 1fr; gap: 22px; }
  .compare > div { padding: 26px 24px; }
  .ai5 { padding: 0; }
  .ai5-track { grid-template-columns: 1fr; gap: 26px; }
  .ai5-track::before { left: 34px; right: auto; top: 24px; bottom: 24px; width: 2px; height: auto; }
  .ai5-step { display: grid; grid-template-columns: 68px 1fr; gap: 0 18px; text-align: left; align-items: center; }
  .ai5-note { text-align: left; margin-left: 0; }
}

@media (max-width: 860px) {
  :root { --nav-h: 64px; }
  .section { padding: 72px 0; }
  .section-sm { padding: 52px 0; }
  .g2, .g3, .split, .contact-grid { grid-template-columns: 1fr; }
  .split { gap: 36px; }
  .hero { padding: 68px 0 76px; }
  .page-hero { padding: 56px 0 62px; }
  .hero-stats { gap: 32px; }
  .cta-band { padding: 44px 28px; border-radius: var(--r-lg); }
  .module-grid { grid-template-columns: 1fr; }
  .compare { grid-template-columns: 1fr; }
  .compare > div:first-child { border-right: 0; border-bottom: 1px solid var(--ink-200); }
  .path-cmp { grid-template-columns: 1fr; }
  .tech-split { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 1fr; gap: 14px; padding: 22px 22px; }
  .layer .ly-tag { flex-direction: row; align-items: center; gap: 10px; }
  .metric-strip { grid-template-columns: 1fr; gap: 18px; }
  .nav-toggle { display: flex; }
  .nav-cta .btn { display: none; }
  .nav-links {
    position: fixed; inset: var(--nav-h) 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: #fff; border-bottom: 1px solid var(--ink-200);
    padding: 12px 16px 20px; margin: 0;
    box-shadow: 0 20px 40px rgba(13,17,23,.1);
    transform: translateY(-8px); opacity: 0; pointer-events: none;
    transition: opacity .22s var(--ease), transform .22s var(--ease);
    max-height: calc(100vh - var(--nav-h)); overflow-y: auto;
  }
  .nav-open .nav-links { opacity: 1; transform: none; pointer-events: auto; }
  .nav-links a { padding: 12px 14px; font-size: 1rem; }
  .nav-links a.active::after { display: none; }
  .nav-links a.active { background: var(--brand-50); }
}

@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .g4 { grid-template-columns: 1fr; }
  .proof-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .card, .service-card { padding: 24px 22px; }
  .compare > div { padding: 26px 22px; }
  .hero-actions .btn { width: 100%; }
  .step { grid-template-columns: 44px 1fr; gap: 16px; }
  .hero-stats { gap: 26px 34px; }
  .hero-stat-num { font-size: 1.55rem; }
  .pain-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .hero-checks { flex-direction: column; gap: 10px; }
  .side-bar { right: 10px; bottom: 14vh; gap: 8px; }
  .side-btn { width: 40px; height: 40px; border-radius: 10px; }
  .logo-img { height: 32px; }
  .logo.on-dark { padding: 6px 10px; }
  .logo.on-dark .logo-img { height: 28px; }
}