/* ═══════════════════════════════════════════════
   小小思路律师工作台 · 本地版官网
   设计语言：苹果经典白 × 产品墨绿 × 编辑部衬线
   ═══════════════════════════════════════════════ */

:root {
  --paper: #FBFAF7;
  --paper-2: #F4F2EC;
  --card: #FFFFFF;
  --ink: #1C1A15;
  --ink-2: #55524A;
  --ink-3: #8F8B7F;
  --line: rgba(28, 26, 21, .09);
  --brand: #2C4A44;
  --brand-deep: #223B36;
  --brand-soft: rgba(44, 74, 68, .07);
  --amber: #B07D2B;
  --risk: #A8463C;
  --ok: #2C4A44;
  --dark: #16150F;
  --dark-2: #201E18;
  --cream: #F2F0E9;
  --cream-2: #B9B6AC;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", ui-serif, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, "Courier New", monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --r-lg: 26px;
  --r-md: 16px;
  --r-sm: 10px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
::selection { background: rgba(44, 74, 68, .18); }

/* ── 进场动效 ── */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
}
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ═══════════ 导航 ═══════════ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  backdrop-filter: saturate(1.6) blur(20px);
  -webkit-backdrop-filter: saturate(1.6) blur(20px);
  background: rgba(251, 250, 247, .72);
  border-bottom: 1px solid transparent;
  transition: border-color .4s, background .4s;
}
.nav.scrolled { border-bottom-color: var(--line); }
.nav-inner {
  max-width: 1120px; margin: 0 auto; height: 58px;
  display: flex; align-items: center; gap: 28px;
  padding: 0 28px;
}
.nav-brand { display: flex; align-items: center; gap: 9px; margin-right: auto; }
.nav-logo { width: 22px; height: 22px; }
.nav-name { font-size: 14px; font-weight: 600; letter-spacing: .02em; }
.nav-tag {
  font-size: 11px; color: var(--brand); background: var(--brand-soft);
  border: 1px solid rgba(44, 74, 68, .18);
  padding: 1px 8px; border-radius: 99px; letter-spacing: .06em;
}
.nav-links { display: flex; gap: 26px; }
.nav-links a { font-size: 13px; color: var(--ink-2); transition: color .2s; }
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  font-size: 13px; font-weight: 500;
  color: var(--cream); background: var(--brand);
  padding: 6px 16px; border-radius: 99px;
  transition: background .25s, transform .25s;
}
.nav-cta:hover { background: var(--brand-deep); transform: translateY(-1px); }
@media (max-width: 860px) { .nav-links { display: none; } }

/* ═══════════ Hero ═══════════ */
.hero { padding: 168px 28px 0; text-align: center; overflow: hidden; }
.hero-copy { max-width: 880px; margin: 0 auto; }
.hero-eyebrow {
  font-size: 14px; letter-spacing: .22em; color: var(--brand);
  font-weight: 600; margin-bottom: 22px;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(42px, 6.8vw, 86px);
  line-height: 1.12; font-weight: 700;
  letter-spacing: .015em;
  margin-bottom: 26px;
}
.hero-sub {
  font-size: clamp(16px, 1.8vw, 20px);
  color: var(--ink-2); line-height: 1.8;
  margin-bottom: 38px;
}
.hero-actions { display: flex; gap: 14px; justify-content: center; margin-bottom: 84px; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 15px; font-weight: 500;
  padding: 12px 30px; border-radius: 99px;
  transition: transform .3s var(--ease), background .3s, box-shadow .3s;
}
.btn-primary {
  background: var(--brand); color: var(--cream);
  box-shadow: 0 10px 26px -10px rgba(44, 74, 68, .5);
}
.btn-primary:hover { background: var(--brand-deep); transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { background: var(--brand-soft); transform: translateY(-2px); }

/* ── 产品窗口 ── */
.hero-stage { max-width: 1120px; margin: 0 auto; perspective: 1600px; }
.appwin {
  background: #FAF9F5;
  border-radius: 18px 18px 0 0;
  border: 1px solid var(--line); border-bottom: none;
  box-shadow: 0 60px 120px -30px rgba(28, 26, 21, .28), 0 24px 48px -24px rgba(28, 26, 21, .14);
  overflow: hidden;
  text-align: left;
  transform-origin: 50% 100%;
  will-change: transform;
}
.appwin-bar {
  display: flex; align-items: center; gap: 7px;
  height: 40px; padding: 0 16px;
  background: #F0EEE6;
  border-bottom: 1px solid var(--line);
}
.tl { width: 11px; height: 11px; border-radius: 50%; }
.tl-r { background: #E5645C; } .tl-y { background: #E5B94E; } .tl-g { background: #63BE6B; }
.appwin-title {
  margin-left: 12px; font-size: 11.5px; color: #8F8B7F;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  min-width: 0; flex: 1;
}
.appwin-body {
  display: grid;
  grid-template-columns: 208px 1fr 226px;
  height: 560px;
  font-size: 12px;
}
@media (max-width: 980px) { .appwin-body { grid-template-columns: 180px 1fr; } .aw-panel { display: none; } }
@media (max-width: 720px) { .appwin-body { grid-template-columns: 1fr; } .aw-side { display: none; } .appwin-body { height: 520px; } }

/* 侧栏 */
.aw-side {
  background: #F0EEE6; border-right: 1px solid var(--line);
  padding: 14px 10px; overflow: hidden;
}
.aw-side-head {
  display: flex; align-items: center; gap: 7px;
  font-weight: 600; font-size: 12.5px; padding: 2px 8px 12px;
}
.aw-side-logo { width: 18px; height: 18px; }
.aw-newchat {
  margin: 0 4px 14px; padding: 7px 10px;
  background: #FDFBF6; border: 1px solid var(--line); border-radius: 8px;
  color: var(--ink-2); font-size: 11.5px;
}
.aw-group {
  font-size: 10.5px; color: #8F8B7F; letter-spacing: .1em;
  padding: 10px 10px 5px;
}
.aw-case {
  padding: 6px 10px; border-radius: 8px; color: #57544C;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.aw-case.open { color: #26241F; }
.aw-case-name { display: block; font-weight: 500; overflow: hidden; text-overflow: ellipsis; }
.aw-sess {
  margin: 2px 0 0 10px; padding: 5px 8px; border-radius: 7px;
  color: #57544C; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.aw-sess.active { background: rgba(31, 30, 27, .07); color: #26241F; font-weight: 500; }
.aw-sess.plain { margin-left: 0; padding: 6px 10px; }

/* 对话区 */
.aw-chat { display: flex; flex-direction: column; background: #FAF9F5; min-width: 0; }
.aw-chat-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; border-bottom: 1px solid var(--line);
}
.aw-badge {
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--brand); color: var(--cream);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 14px;
}
.aw-chat-name { font-weight: 600; font-size: 12.5px; }
.aw-chat-sub { font-size: 10.5px; color: #8F8B7F; }
.aw-msgs { flex: 1; padding: 18px 20px; overflow: hidden; display: flex; flex-direction: column; gap: 12px; }
.aw-msg { max-width: 88%; padding: 9px 13px; border-radius: 13px; line-height: 1.65; min-width: 0; }
.aw-msg.user {
  align-self: flex-end;
  background: var(--brand); color: var(--cream);
  border-bottom-right-radius: 4px;
}
.aw-msg.ai { align-self: flex-start; color: #26241F; padding: 2px 0; max-width: 96%; }
.aw-msg.ai p { margin-bottom: 8px; }
.aw-steps { display: flex; flex-direction: column; gap: 3px; align-self: flex-start; }
.aw-step {
  display: flex; align-items: baseline; gap: 7px;
  font-size: 11px; color: #57544C;
}
.aw-step i { font-style: normal; color: #8F8B7F; }
.aw-step em { font-style: normal; font-family: var(--mono); font-size: 10px; color: #B0AC9E; margin-left: auto; }
.aw-step.done::before { content: "✓"; color: var(--brand); font-weight: 600; }
.aw-composer {
  margin: 0 20px 16px; padding: 10px 14px;
  background: #FDFBF6; border: 1px solid var(--line); border-radius: 12px;
  display: flex; align-items: center; justify-content: space-between;
  color: #B0AC9E; font-size: 11.5px;
}
.aw-send {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--brand); color: var(--cream);
  display: flex; align-items: center; justify-content: center; font-size: 12px;
}

/* 迷你时间轴（产品窗口内） */
.mini-tl {
  margin: 10px 0; padding: 12px 14px;
  background: #FDFBF6; border: 1px solid var(--line); border-radius: 12px;
  min-width: 0; overflow: hidden;
}
.mini-tl-head {
  display: flex; align-items: baseline; justify-content: space-between;
  padding-bottom: 8px; margin-bottom: 8px; border-bottom: 1px solid var(--line);
}
.mini-tl-title { font-family: var(--serif); font-size: 13px; font-weight: 700; }
.mini-tl-count { font-family: var(--mono); font-size: 10px; color: #8F8B7F; }
.mini-tl-item {
  display: grid; grid-template-columns: 74px 14px 1fr;
  gap: 0; padding: 4px 0; align-items: start;
}
.mini-tl-date {
  font-family: var(--mono); font-size: 10px; color: var(--brand);
  letter-spacing: .04em; padding-top: 2px; text-align: right; padding-right: 2px;
  white-space: nowrap;
}
.mini-tl-dot {
  width: 7px; height: 7px; border-radius: 50%;
  border: 1.5px solid var(--brand); background: #FDFBF6;
  margin: 4px auto 0; position: relative;
}
.mini-tl-item:not(:last-child) .mini-tl-dot::after {
  content: ""; position: absolute; top: 7px; left: 50%; transform: translateX(-50%);
  width: 1px; height: 22px; background: rgba(44, 74, 68, .25);
}
.mini-tl-body { font-size: 11px; color: #26241F; line-height: 1.55; }
.mini-tl-cite {
  display: inline-block; margin-left: 6px;
  font-size: 9.5px; color: var(--brand);
  background: var(--brand-soft); border: 1px solid rgba(44, 74, 68, .15);
  border-radius: 99px; padding: 0 7px; white-space: nowrap;
}

/* 右栏 */
.aw-panel {
  border-left: 1px solid var(--line); background: #FDFBF6;
  padding: 12px 12px; overflow: hidden;
}
.aw-panel-tabs { display: flex; gap: 14px; padding: 0 4px 10px; border-bottom: 1px solid var(--line); margin-bottom: 10px; }
.aw-panel-tabs span { font-size: 11.5px; color: #8F8B7F; padding-bottom: 8px; }
.aw-panel-tabs .on { color: #26241F; font-weight: 600; border-bottom: 2px solid var(--brand); margin-bottom: -11px; }
.aw-panel-group { font-size: 10px; color: #8F8B7F; letter-spacing: .08em; padding: 8px 4px 5px; }
.aw-file { display: flex; gap: 8px; align-items: center; padding: 6px 4px; border-radius: 8px; }
.aw-file b { display: block; font-size: 11px; font-weight: 500; color: #26241F; }
.aw-file i { font-style: normal; font-size: 9.5px; color: #8F8B7F; }
.aw-file-ic { width: 22px; height: 26px; border-radius: 5px; flex: none; position: relative; }
.aw-file-ic::after { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 7px; font-weight: 700; color: #fff; font-family: var(--mono); }
.aw-file-ic.pdf { background: #A8463C; } .aw-file-ic.pdf::after { content: "PDF"; }
.aw-file-ic.md { background: #8F8B7F; } .aw-file-ic.md::after { content: "MD"; }
.aw-file-ic.doc { background: #2C4A44; } .aw-file-ic.doc::after { content: "DOC"; }

/* ═══════════ 信任条 ═══════════ */
.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--card); margin-top: 96px; }
.strip-inner {
  max-width: 1120px; margin: 0 auto; padding: 34px 28px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.strip-item b { display: block; font-family: var(--serif); font-size: 17px; margin-bottom: 4px; }
.strip-item span { font-size: 13px; color: var(--ink-2); }
@media (max-width: 860px) { .strip-inner { grid-template-columns: repeat(2, 1fr); } }

/* ═══════════ 通用区块 ═══════════ */
.section { padding: 130px 28px; max-width: 1120px; margin: 0 auto; }
.section-alt { max-width: none; background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section-alt > * { max-width: 1120px; margin-left: auto; margin-right: auto; }
.section-head { text-align: center; margin-bottom: 72px; }
.eyebrow {
  font-size: 13px; letter-spacing: .24em; font-weight: 600;
  color: var(--brand); margin-bottom: 16px;
}
.eyebrow-light { color: #9CC2B5; }
.section-head h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.18; letter-spacing: .015em;
  margin-bottom: 20px;
}
.section-sub { color: var(--ink-2); font-size: clamp(15px, 1.6vw, 17px); line-height: 1.85; }

/* ═══════════ 功能 bento ═══════════ */
.bento { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.bento-card {
  background: var(--card);
  border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 40px 40px 0;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 30px 60px -24px rgba(28, 26, 21, .18);
}
.bento-lg { grid-column: span 2; }
.bento-copy h3 {
  font-family: var(--serif); font-size: 24px; letter-spacing: .01em;
  margin-bottom: 10px;
}
.bento-copy p { color: var(--ink-2); font-size: 14.5px; line-height: 1.8; max-width: 560px; }
.bento-visual { margin-top: 30px; }
@media (max-width: 860px) {
  .bento { grid-template-columns: 1fr; }
  .bento-lg { grid-column: span 1; }
  .bento-card { padding: 28px 24px 0; }
}

/* 时间轴演示 */
.tl-demo {
  position: relative;
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
}
.tl-demo-rail {
  position: absolute; left: 118px; top: 34px; bottom: 40px;
  width: 1px; background: rgba(44, 74, 68, .22);
}
.tl-demo-item {
  display: grid; grid-template-columns: 96px 44px 1fr;
  align-items: start; padding: 9px 0;
}
.tl-demo-item .d {
  font-family: var(--mono); font-size: 12px; color: var(--brand);
  letter-spacing: .05em; text-align: right; padding-top: 1px;
}
.tl-demo-item i {
  width: 9px; height: 9px; border-radius: 50%;
  border: 2px solid var(--brand); background: var(--card);
  justify-self: center; margin-top: 4px; z-index: 1;
}
.tl-demo-item div { font-size: 14px; color: var(--ink); }
.cite {
  display: inline-block; margin-left: 8px;
  font-size: 11px; color: var(--brand);
  background: var(--brand-soft); border: 1px solid rgba(44, 74, 68, .15);
  border-radius: 99px; padding: 0 9px; white-space: nowrap;
}
@media (max-width: 640px) {
  .tl-demo-rail { left: 12px; }
  .tl-demo-item { grid-template-columns: 24px 1fr; }
  .tl-demo-item .d { grid-column: 2; text-align: left; padding: 0 0 2px; }
  .tl-demo-item i { grid-row: 1; grid-column: 1; margin-top: 7px; }
  .tl-demo-item div { grid-column: 2; }
}

/* 法条校验演示 */
.basis-demo { display: flex; flex-direction: column; gap: 12px; padding-bottom: 34px; }
.basis-card {
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 16px 18px; background: var(--paper);
}
.basis-card.ok { border-left: 3px solid var(--ok); }
.basis-card.bad { border-left: 3px solid var(--risk); }
.basis-head { display: flex; align-items: baseline; gap: 9px; margin-bottom: 7px; }
.basis-mark { font-weight: 700; }
.basis-card.ok .basis-mark { color: var(--ok); }
.basis-card.bad .basis-mark { color: var(--risk); }
.basis-head b { font-size: 13.5px; }
.basis-head em { font-style: normal; margin-left: auto; font-size: 11px; }
.basis-card.ok em { color: var(--ok); }
.basis-card.bad em { color: var(--risk); }
.basis-card p { font-size: 12.5px; color: var(--ink-2); line-height: 1.7; }

/* 文书演示 */
.doc-demo { display: flex; flex-direction: column; gap: 12px; padding-bottom: 34px; }
.doc-card {
  display: flex; align-items: center; gap: 14px;
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 15px 18px; background: var(--paper);
  transition: box-shadow .3s;
}
.doc-card:hover { box-shadow: 0 10px 24px -12px rgba(28, 26, 21, .16); }
.doc-ic { width: 30px; height: 36px; border-radius: 7px; flex: none; position: relative; }
.doc-ic::after { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 8px; font-weight: 700; color: #fff; font-family: var(--mono); }
.doc-ic.docx { background: var(--brand); } .doc-ic.docx::after { content: "DOCX"; }
.doc-ic.pdf { background: #A8463C; } .doc-ic.pdf::after { content: "PDF"; }
.doc-meta b { display: block; font-size: 14px; font-weight: 600; }
.doc-meta i { font-style: normal; font-size: 11.5px; color: var(--ink-3); }
.doc-open {
  margin-left: auto; font-size: 12.5px; color: var(--brand);
  border: 1px solid rgba(44, 74, 68, .25); border-radius: 99px; padding: 4px 14px;
}

/* OCR 演示 */
.ocr-demo {
  display: grid; grid-template-columns: 1fr 28px 1fr; gap: 10px; align-items: center;
  padding-bottom: 34px;
}
.ocr-scan {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 18px 16px; position: relative;
  background-image: repeating-linear-gradient(0deg, transparent 0 3px, rgba(28,26,21,.012) 3px 4px);
}
.ocr-line { height: 7px; border-radius: 4px; background: rgba(28, 26, 21, .13); margin-bottom: 9px; }
.ocr-line.w80 { width: 80%; } .ocr-line.w95 { width: 95%; } .ocr-line.w60 { width: 60%; } .ocr-line.w90 { width: 90%; }
.ocr-badge {
  margin-top: 14px; display: inline-block;
  font-family: var(--mono); font-size: 10px; color: var(--amber);
  background: rgba(176, 125, 43, .1); border: 1px solid rgba(176, 125, 43, .28);
  border-radius: 99px; padding: 2px 10px;
}
.ocr-arrow { text-align: center; color: var(--ink-3); font-size: 18px; }
.ocr-text {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 18px 16px;
}
.ocr-text p { font-size: 12.5px; color: var(--ink-2); line-height: 1.8; margin-bottom: 10px; }
.ocr-text b { color: var(--ink); }
.ocr-text span { font-family: var(--mono); font-size: 10px; color: var(--ok); }
@media (max-width: 560px) { .ocr-demo { grid-template-columns: 1fr; } .ocr-arrow { transform: rotate(90deg); } }

/* 计算器演示 */
.calc-demo {
  border: 1px solid var(--line); border-radius: var(--r-md);
  overflow: hidden; margin-bottom: 34px; background: var(--paper);
}
.calc-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 9px 18px; font-size: 13px;
  border-bottom: 1px solid var(--line);
}
.calc-row span { color: var(--ink-2); }
.calc-row b { font-family: var(--mono); font-weight: 500; }
.calc-row.head { background: rgba(44, 74, 68, .05); }
.calc-row.head b { font-family: var(--sans); font-weight: 600; }
.calc-row.total { background: var(--brand); border-bottom: none; }
.calc-row.total span { color: rgba(242, 240, 233, .8); }
.calc-row.total b { color: var(--cream); font-size: 15px; }

/* 过程可视化演示 */
.steps-demo { display: flex; flex-direction: column; gap: 10px; padding-bottom: 36px; }
.s-step { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--ink-2); }
.s-step i { font-style: normal; color: var(--ink-3); font-size: 12px; }
.s-step em { font-style: normal; margin-left: auto; font-family: var(--mono); font-size: 11px; color: var(--ink-3); }
.s-step.done .s-ic { color: var(--ok); font-weight: 700; }
.s-step.doing { color: var(--amber); }
.s-ic.pulse {
  width: 8px; height: 8px; border-radius: 50%; background: var(--amber);
  animation: pulse 1.6s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: .35; transform: scale(.85); } 50% { opacity: 1; transform: scale(1.1); } }

/* 案件文件夹演示 */
.folder-demo {
  border: 1px solid var(--line); border-radius: var(--r-md);
  background: var(--paper); padding: 16px 18px; margin-bottom: 34px;
  font-size: 13px;
}
.folder-row { display: flex; align-items: center; gap: 9px; padding: 4.5px 0; color: var(--ink); }
.folder-row.indent { padding-left: 22px; }
.folder-row.indent2 { padding-left: 44px; color: var(--ink-2); font-size: 12.5px; }
.folder-ic {
  width: 16px; height: 13px; border-radius: 3px;
  background: rgba(44, 74, 68, .28); flex: none;
  position: relative;
}
.folder-ic::before {
  content: ""; position: absolute; top: -3px; left: 0;
  width: 8px; height: 4px; border-radius: 2px 2px 0 0;
  background: rgba(44, 74, 68, .28);
}
.folder-row .doc-ic, .folder-row .md-ic { width: 13px; height: 16px; border-radius: 3px; }
.folder-row .doc-ic::after, .folder-row .md-ic::after { content: none; }
.md-ic { background: #8F8B7F; }
.folder-tip {
  margin-top: 12px; padding-top: 10px; border-top: 1px dashed var(--line);
  font-family: var(--mono); font-size: 10.5px; color: var(--brand);
}

/* ═══════════ 案例演示 ═══════════ */
.case {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 56px;
  align-items: center;
  padding: 64px 0;
}
.case + .case { border-top: 1px solid var(--line); }
.case.flip .case-copy { order: 2; }
.case.flip .case-chat { order: 1; }
.case-no {
  display: inline-block; font-size: 12px; letter-spacing: .14em;
  color: var(--brand); font-weight: 600;
  border: 1px solid rgba(44, 74, 68, .22); border-radius: 99px;
  padding: 3px 13px; margin-bottom: 20px;
}
.case-copy h3 {
  font-family: var(--serif); font-size: clamp(26px, 2.8vw, 36px);
  line-height: 1.24; margin-bottom: 16px; letter-spacing: .01em;
}
.case-copy p { color: var(--ink-2); font-size: 15px; line-height: 1.85; margin-bottom: 22px; }
.case-points li {
  position: relative; padding-left: 22px; margin-bottom: 10px;
  font-size: 14px; color: var(--ink);
}
.case-points li::before {
  content: ""; position: absolute; left: 0; top: 9px;
  width: 10px; height: 5px;
  border-left: 2px solid var(--brand); border-bottom: 2px solid var(--brand);
  transform: rotate(-45deg);
}
@media (max-width: 900px) {
  .case { grid-template-columns: 1fr; gap: 34px; }
  .case.flip .case-copy { order: 1; }
  .case.flip .case-chat { order: 2; }
}

/* 案例对话窗 */
.case-chat {
  background: #FAF9F5;
  border: 1px solid var(--line); border-radius: var(--r-lg);
  box-shadow: 0 30px 60px -28px rgba(28, 26, 21, .2);
  padding: 26px 24px;
  display: flex; flex-direction: column; gap: 12px;
  font-size: 13.5px;
}
.cc-msg { max-width: 92%; line-height: 1.75; }
.cc-msg.user {
  align-self: flex-end;
  background: var(--brand); color: var(--cream);
  padding: 10px 15px; border-radius: 14px; border-bottom-right-radius: 4px;
}
.cc-msg.ai { align-self: flex-start; color: var(--ink); }
.cc-msg.ai p { margin-bottom: 10px; }
.cc-msg.ai b { color: var(--brand-deep); }
.cc-step {
  display: flex; align-items: baseline; gap: 8px;
  font-size: 12px; color: var(--ink-2);
}
.cc-step.done::before { content: "✓"; color: var(--ok); font-weight: 700; }
.cc-step i { font-style: normal; color: var(--ink-3); }
.cc-step em { font-style: normal; margin-left: auto; font-family: var(--mono); font-size: 10.5px; color: var(--ink-3); }
.cc-art {
  display: flex; align-items: center; gap: 11px;
  background: #FDFBF6; border: 1px solid var(--line); border-radius: 12px;
  padding: 11px 14px; margin-top: 4px;
}
.cc-art b { font-size: 13px; }
.cc-art i { font-style: normal; font-size: 11px; color: var(--ink-3); margin-left: auto; }
.cc-art-ic { width: 24px; height: 28px; border-radius: 6px; flex: none; position: relative; }
.cc-art-ic::after { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 7.5px; font-weight: 700; color: #fff; font-family: var(--mono); }
.cc-art-ic.tl { background: var(--amber); } .cc-art-ic.tl::after { content: "MD"; }
.cc-art-ic.docx { background: var(--brand); } .cc-art-ic.docx::after { content: "DOCX"; }

/* ═══════════ 使用流程 ═══════════ */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.flow-step {
  border: 1px solid var(--line); border-radius: var(--r-lg);
  background: var(--card); padding: 32px 26px;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.flow-step:hover { transform: translateY(-4px); box-shadow: 0 24px 48px -22px rgba(28, 26, 21, .16); }
.flow-no {
  display: block; font-family: var(--mono); font-size: 13px;
  color: var(--brand); letter-spacing: .12em; margin-bottom: 18px;
}
.flow-step h3 { font-family: var(--serif); font-size: 20px; margin-bottom: 10px; }
.flow-step p { font-size: 13.5px; color: var(--ink-2); line-height: 1.8; }
@media (max-width: 900px) { .flow { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .flow { grid-template-columns: 1fr; } }

/* ═══════════ 隐私（深色） ═══════════ */
.section-dark {
  max-width: none; background: var(--dark); color: var(--cream);
}
.section-dark > * { max-width: 1120px; margin-left: auto; margin-right: auto; }
.section-dark .section-head h2 { color: var(--cream); }
.priv { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.priv-card {
  background: var(--dark-2);
  border: 1px solid rgba(242, 240, 233, .08);
  border-radius: var(--r-lg); padding: 34px 32px;
}
.priv-card h3 { font-family: var(--serif); font-size: 21px; margin-bottom: 12px; color: var(--cream); }
.priv-card p { font-size: 14px; color: var(--cream-2); line-height: 1.85; }
@media (max-width: 720px) { .priv { grid-template-columns: 1fr; } }

/* ═══════════ FAQ ═══════════ */
.faq { max-width: 780px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary {
  list-style: none; cursor: pointer;
  font-family: var(--serif); font-size: 19px; font-weight: 600;
  padding: 24px 40px 24px 4px; position: relative;
  transition: color .25s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: ""; position: absolute; right: 10px; top: 50%;
  width: 9px; height: 9px;
  border-right: 1.5px solid var(--ink-3); border-bottom: 1.5px solid var(--ink-3);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .35s var(--ease);
}
.faq-item[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq-item summary:hover { color: var(--brand); }
.faq-item p {
  padding: 0 40px 26px 4px;
  color: var(--ink-2); font-size: 14.5px; line-height: 1.85;
}

/* ═══════════ 试用 CTA ═══════════ */
.trial {
  padding: 150px 28px;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(44, 74, 68, .12), transparent 70%),
    var(--paper-2);
  border-top: 1px solid var(--line);
  text-align: center;
}
.trial-logo { width: 64px; height: 64px; margin: 0 auto 30px; }
.trial h2 {
  font-family: var(--serif);
  font-size: clamp(32px, 4.8vw, 60px);
  line-height: 1.18; letter-spacing: .015em;
  margin-bottom: 20px;
}
.trial p { color: var(--ink-2); font-size: 16px; margin-bottom: 34px; }
.trial-contact {
  display: flex; gap: 18px; justify-content: center; flex-wrap: wrap;
  margin-bottom: 26px;
}
.tc-item {
  background: rgba(255, 255, 255, .6);
  border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 16px 30px; min-width: 150px;
}
.tc-item span {
  display: block; font-size: 12px; color: var(--ink-3);
  letter-spacing: .12em; margin-bottom: 6px;
}
.tc-item b { font-size: 19px; font-weight: 600; letter-spacing: .02em; }
.tc-item a { transition: color .2s; }
.tc-item a:hover { color: var(--brand); }
.trial-company { font-size: 13px; color: var(--ink-3); margin-bottom: 0 !important; }

/* ═══════════ Footer ═══════════ */
.footer { border-top: 1px solid var(--line); background: var(--card); }
.footer-inner { max-width: 1120px; margin: 0 auto; padding: 44px 28px; text-align: center; }
.footer-brand {
  display: flex; align-items: center; justify-content: center; gap: 9px;
  font-weight: 600; font-size: 14px; margin-bottom: 14px;
}
.footer-logo { width: 20px; height: 20px; }
.footer-note { font-size: 12.5px; color: var(--ink-3); margin-bottom: 6px; }
.footer-copy { font-size: 12px; color: var(--ink-3); }