/* ============================================================
   领域 · 企业服务主站  v3.0
   视觉家族：米白纸张底色 / 墨黑正文 / 宋体大标题 / 橙色重点 / 细线卡片 / 大面积留白
   ============================================================ */

:root {
  --bg: #F6F1E8;
  --paper: #FFFDF8;
  --ink: #171612;
  --ink-2: #4E4A42;
  --ink-3: #8A8478;
  --accent: #C95D22;
  --accent-soft: #F3E2D4;
  --green: #526E5B;
  --green-soft: #E4EAE2;
  --line: #D9D2C4;
  --line-strong: #B9B0A0;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --max: 1120px;
  --radius: 4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--accent-soft); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246, 241, 232, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  max-width: var(--max); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; gap: 32px;
  height: 68px;
}
.brand { display: flex; align-items: baseline; gap: 10px; flex-shrink: 0; }
.brand:hover { text-decoration: none; }
.brand-name {
  font-family: var(--serif); font-size: 24px; font-weight: 700;
  color: var(--ink); letter-spacing: 2px;
}
.brand-tag { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }

.main-nav { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.main-nav a.nav-link {
  color: var(--ink-2); font-size: 15px; white-space: nowrap;
  padding: 4px 0; border-bottom: 2px solid transparent;
}
.main-nav a.nav-link:hover { color: var(--ink); text-decoration: none; }
.main-nav a.nav-link[aria-current="page"] {
  color: var(--ink); border-bottom-color: var(--accent);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
  display: none; background: none; border: 1px solid var(--line-strong);
  border-radius: var(--radius); padding: 8px 12px; margin-left: auto;
  font-size: 15px; color: var(--ink); cursor: pointer; font-family: var(--sans);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; font-family: var(--sans);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #FFFDF8; }
.btn-primary:hover { background: #AE4E1A; }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--line-strong); }
.btn-outline:hover { border-color: var(--ink); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-disabled, .btn[disabled] {
  background: var(--paper); color: var(--ink-3);
  border: 1px dashed var(--line-strong); cursor: not-allowed;
}
.btn-disabled:hover { text-decoration: none; }

/* ---------- 页面区块 ---------- */
.section { padding: 88px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-paper { background: var(--paper); }

.kicker {
  font-size: 13px; letter-spacing: 3px; color: var(--accent);
  font-weight: 600; margin-bottom: 14px;
}
.kicker .kicker-no { color: var(--ink-3); margin-right: 8px; }

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 700; line-height: 1.35; }
.h-section { font-size: 34px; margin-bottom: 18px; letter-spacing: 1px; }
.lead { font-size: 18px; color: var(--ink-2); max-width: 760px; }
.section-head { margin-bottom: 48px; }

/* ---------- 首屏 ---------- */
.hero { padding: 120px 0 96px; }
.hero-grid {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 72px; align-items: center;
}
.hero-eyebrow {
  font-family: var(--serif); font-size: 19px; color: var(--accent);
  margin-bottom: 22px; letter-spacing: 1px;
}
.hero-title { font-size: 44px; letter-spacing: 2px; }
.hero-sub {
  margin-top: 26px; font-size: 18px; color: var(--ink-2);
  max-width: 560px; line-height: 1.9;
}
.hero-actions { margin-top: 40px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-mini {
  margin-top: 30px; font-size: 14px; color: var(--ink-3); letter-spacing: 2px;
}

/* 首屏「业务现场」卡片 */
.live-card {
  position: relative; background: var(--paper);
  border: 1px solid var(--line);
  padding: 34px 32px 28px; z-index: 0;
}
.live-card::before,
.live-card::after {
  content: ""; position: absolute; inset: 0;
  pointer-events: none; z-index: -1;
}
.live-card::before {
  border: 1px solid rgba(201, 93, 34, 0.4);
  transform: translate(-14px, -16px);
}
.live-card::after {
  border: 1px solid rgba(201, 93, 34, 0.2);
  transform: translate(12px, 14px);
}
.live-card-head {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 13px; letter-spacing: 2px; color: var(--ink-3);
  padding-bottom: 20px; border-bottom: 1px solid var(--line);
}
.live-status {
  display: inline-flex; align-items: center; gap: 7px;
  color: var(--green); font-weight: 600;
}
.live-status-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--green); display: inline-block;
  animation: live-pulse 2.2s ease-in-out infinite;
}
@keyframes live-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}
.live-q-label {
  margin-top: 26px; font-size: 13px; letter-spacing: 2px;
  color: var(--accent); font-weight: 600;
}
.live-q {
  margin-top: 12px; font-family: var(--serif);
  font-size: 26px; font-weight: 700; line-height: 1.5;
}
.live-panel {
  margin-top: 26px; background: #1C1A15;
  padding: 20px; border-radius: 2px;
}
.live-row {
  display: flex; align-items: baseline; gap: 16px;
  padding: 15px 16px; color: #FFFDF8;
  border: 1px solid rgba(255, 253, 248, 0.14);
}
.live-row + .live-row { margin-top: 10px; }
.live-row.is-active {
  border-color: var(--accent);
  background: rgba(201, 93, 34, 0.14);
}
.live-row-no {
  font-family: var(--serif); font-size: 13px; color: var(--accent);
  letter-spacing: 1px;
}
.live-row-name { font-family: var(--serif); font-size: 17px; font-weight: 700; }
.live-row-desc {
  margin-left: auto; font-size: 13px; color: #B9B0A0;
}
.live-foot {
  margin-top: 24px; display: flex;
  justify-content: space-between; align-items: baseline;
}
.live-foot-muted { font-size: 14px; color: var(--ink-3); }
.live-foot-accent {
  font-family: var(--serif); font-size: 20px;
  color: var(--accent); font-weight: 700; letter-spacing: 1px;
}

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px;
}
.card-no {
  font-family: var(--serif); font-size: 15px; color: var(--accent);
  letter-spacing: 2px; margin-bottom: 12px; font-weight: 700;
}
.card h3 { font-size: 20px; margin-bottom: 12px; }
.card p { color: var(--ink-2); font-size: 15px; }
.card ul { margin: 10px 0 0 18px; color: var(--ink-2); font-size: 15px; }
.card li { margin-bottom: 6px; }

/* ---------- A—B—C 路径 ---------- */
.path { display: grid; grid-template-columns: 1fr 1.25fr 1fr; gap: 20px; align-items: stretch; }
.path-step {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 32px 28px; position: relative;
}
.path-step .step-letter {
  font-family: var(--serif); font-size: 44px; color: var(--ink-3);
  line-height: 1; margin-bottom: 14px;
}
.path-step h3 { font-size: 21px; margin-bottom: 10px; }
.path-step p { color: var(--ink-2); font-size: 15px; }
.path-step.is-core { border: 2px solid var(--accent); }
.path-step.is-core .step-letter { color: var(--accent); }
.path-step .step-tag {
  display: inline-block; font-size: 12px; letter-spacing: 1px;
  color: var(--accent); border: 1px solid var(--accent);
  border-radius: 999px; padding: 2px 12px; margin-bottom: 14px;
}
.path-step.is-c .step-letter { color: var(--green); }

/* ---------- 六阶段 ---------- */
.stages { display: grid; grid-template-columns: repeat(6, 1fr); gap: 12px; }
.stage {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 20px 16px;
}
.stage-no {
  font-family: var(--serif); font-size: 26px; color: var(--accent);
  line-height: 1; margin-bottom: 10px;
}
.stage h4 { font-size: 16px; margin-bottom: 8px; }
.stage p { font-size: 13px; color: var(--ink-2); line-height: 1.7; }
.stages-5 { grid-template-columns: repeat(5, 1fr); }
.stages-note { margin-top: 20px; font-size: 14px; color: var(--ink-3); }

/* ---------- 状态漏斗 ---------- */
.funnel { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.funnel-row {
  display: grid; grid-template-columns: 200px 1fr; gap: 24px;
  padding: 22px 28px; background: var(--paper);
  border-bottom: 1px solid var(--line); align-items: baseline;
}
.funnel-row:last-child { border-bottom: none; }
.funnel-row .f-name { font-family: var(--serif); font-size: 19px; font-weight: 700; }
.funnel-row .f-evidence { color: var(--ink-2); font-size: 15px; }
.funnel-row.is-stable { background: var(--green-soft); }

/* ---------- 标准表（五项阶段标准） ---------- */
.std-list { display: grid; gap: 0; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.std-row {
  display: grid; grid-template-columns: 160px 1fr; gap: 24px;
  padding: 20px 28px; background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.std-row:last-child { border-bottom: none; }
.std-row .std-key { font-weight: 600; font-size: 15px; color: var(--ink); }
.std-row .std-val { color: var(--ink-2); font-size: 15px; }

/* ---------- 模块网格（C 八模块） ---------- */
.module-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.module {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
}
.module h4 { font-size: 18px; margin-bottom: 6px; }
.module h4 .m-no { color: var(--green); margin-right: 8px; font-family: var(--serif); }
.module .m-q { font-size: 14px; color: var(--accent); margin-bottom: 10px; }
.module p { font-size: 14px; color: var(--ink-2); }
.module .m-gate { margin-top: 10px; font-size: 13px; color: var(--ink-3); border-top: 1px dashed var(--line); padding-top: 10px; }

/* ---------- 对比 ---------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.compare-col { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.compare-col.is-yes { border-top: 3px solid var(--green); }
.compare-col.is-no { border-top: 3px solid var(--accent); }
.compare-col h3 { font-size: 19px; margin-bottom: 14px; }
.compare-col ul { margin-left: 18px; color: var(--ink-2); font-size: 15px; }
.compare-col li { margin-bottom: 8px; }

/* ---------- 折叠 ---------- */
details.fold { border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); margin-bottom: 12px; }
details.fold summary {
  cursor: pointer; padding: 18px 24px; font-weight: 600; font-size: 16px;
  list-style: none; display: flex; justify-content: space-between; align-items: center;
}
details.fold summary::after { content: "+"; color: var(--accent); font-size: 20px; font-family: var(--serif); }
details.fold[open] summary::after { content: "−"; }
details.fold .fold-body { padding: 0 24px 22px; color: var(--ink-2); font-size: 15px; }

/* ---------- 责任图 ---------- */
.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.role {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px;
}
.role h4 { font-size: 17px; margin-bottom: 8px; color: var(--ink); }
.role p { font-size: 14px; color: var(--ink-2); }

/* ---------- 案例卡 ---------- */
.case-card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; }
.case-card .case-tag {
  display: inline-block; font-size: 12px; letter-spacing: 1px;
  color: var(--ink-2); border: 1px solid var(--line-strong);
  border-radius: 999px; padding: 2px 12px; margin-bottom: 14px;
}
.case-card h3 { font-size: 22px; margin-bottom: 16px; }
.case-block { margin-bottom: 14px; }
.case-block .cb-label { font-size: 13px; color: var(--accent); font-weight: 600; letter-spacing: 1px; margin-bottom: 4px; }
.case-block p { font-size: 15px; color: var(--ink-2); }

.notice {
  border: 1px solid var(--line-strong); border-left: 3px solid var(--accent);
  background: var(--paper); border-radius: var(--radius);
  padding: 20px 24px; font-size: 15px; color: var(--ink-2);
}
.notice strong { color: var(--ink); }

/* ---------- 联系 / CTA ---------- */
.contact-band { background: var(--paper); border-top: 1px solid var(--line); padding: 88px 0; }
.contact-inner { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.contact-inner h2 { font-size: 32px; margin-bottom: 16px; }
.contact-inner p { color: var(--ink-2); max-width: 520px; }
.qr-box {
  background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px; text-align: center;
}
.qr-box img { width: 220px; height: 220px; margin: 0 auto 14px; }
.qr-box .qr-note { font-size: 13px; color: var(--ink-3); }
.qr-box .qr-tip { font-size: 14px; color: var(--ink-2); margin-bottom: 12px; }

/* 移动端全屏二维码 */
.qr-modal {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(23, 22, 18, 0.6); padding: 24px;
  align-items: center; justify-content: center;
}
.qr-modal.is-open { display: flex; }
.qr-modal-panel {
  background: var(--paper); border-radius: var(--radius);
  padding: 32px 28px; max-width: 380px; width: 100%; text-align: center;
}
.qr-modal-panel img { width: 240px; height: 240px; margin: 0 auto 16px; }
.qr-modal-panel .qr-tip { font-size: 14px; color: var(--ink-2); margin-bottom: 18px; }
.qr-modal-close { width: 100%; }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 48px 0 40px; background: var(--bg); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
.footer-grid h4 { font-size: 15px; margin-bottom: 12px; font-family: var(--sans); font-weight: 600; }
.footer-grid a, .footer-grid p { display: block; font-size: 14px; color: var(--ink-2); margin-bottom: 8px; }
.footer-legal { border-top: 1px solid var(--line); padding-top: 20px; font-size: 13px; color: var(--ink-3); }

/* ---------- 工具类 ---------- */
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.center-cta { text-align: center; padding: 64px 0; }
.center-cta h2 { font-size: 30px; margin-bottom: 14px; }
.center-cta p { color: var(--ink-2); margin-bottom: 28px; }
.muted { color: var(--ink-3); font-size: 14px; }
.accent-text { color: var(--accent); }
.green-text { color: var(--green); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .stages, .stages-5 { grid-template-columns: repeat(3, 1fr); }
  .role-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-grid { grid-template-columns: 1fr; gap: 56px; }
  .hero-title { font-size: 40px; }
  .live-card { max-width: 560px; }
}

@media (max-width: 760px) {
  .section { padding: 64px 0; }
  .hero { padding: 80px 0 64px; }
  .hero-eyebrow { font-size: 16px; }
  .hero-title { font-size: 30px; letter-spacing: 1px; }
  .hero-sub { font-size: 16px; }
  .hero-grid { gap: 48px; }
  .hero-mini { letter-spacing: 1px; }
  .live-card { padding: 24px 20px 20px; }
  .live-card::before { transform: translate(-7px, -8px); }
  .live-card::after { transform: translate(6px, 7px); }
  .live-q { font-size: 21px; }
  .live-row { gap: 10px; padding: 12px; }
  .live-row-name { font-size: 15px; }
  .live-row-desc { font-size: 12px; }
  .live-foot-accent { font-size: 17px; }
  .h-section { font-size: 27px; }

  .menu-toggle { display: block; }
  .main-nav {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 8px 24px 20px;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a.nav-link { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 16px; }
  .main-nav a.nav-link[aria-current="page"] { border-bottom: 1px solid var(--line); color: var(--accent); }
  .nav-actions { flex-direction: column; align-items: stretch; margin-top: 14px; gap: 10px; }
  .nav-actions .btn { width: 100%; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .path { grid-template-columns: 1fr; }
  .stages, .stages-5 { grid-template-columns: repeat(2, 1fr); }
  .module-grid, .compare, .role-grid { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .funnel-row { grid-template-columns: 1fr; gap: 6px; }
  .std-row { grid-template-columns: 1fr; gap: 6px; }
}