/* ============================================================
   遇见系列-AI全智能写小说 — 官网样式
   设计语言与应用工作台一致：纸墨书香（纸底 / 朱砂 / 宋体标题）
   ============================================================ */

:root {
  --bg-page: #f7f3ea;
  --bg-card: #fffdf7;
  --bg-elevated: #ffffff;
  --bg-hover: #f1ebdd;
  --bg-sunken: #efe8d9;
  --bg-stripe: #faf6ec;

  --text-primary: #2b2a26;
  --text-secondary: #6b675c;
  --text-tertiary: #9b958a;
  --text-inverse: #fdfbf5;

  --accent: #a33a2b;
  --accent-hover: #8c3125;
  --accent-soft: rgba(163, 58, 43, .1);
  --accent-border: rgba(163, 58, 43, .28);

  --gold: #b8873a;
  --border: #e4ddcc;
  --border-strong: #d3c9b2;

  --success: #4a7c3f;
  --info: #4a6fa5;

  --font-ui: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "SimSun", "STSong", serif;
  --font-kai: "Kaiti SC", "KaiTi", "STKaiti", "Noto Serif SC", serif;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;

  --shadow: 0 2px 12px rgba(43, 42, 38, .08);
  --shadow-lg: 0 12px 34px rgba(43, 42, 38, .14);

  --wrap: 1180px;
  --tr: 220ms cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-page);
  background-image:
    radial-gradient(circle at 18% 12%, rgba(163, 58, 43, .03) 0%, transparent 45%),
    radial-gradient(circle at 82% 78%, rgba(74, 111, 165, .03) 0%, transparent 42%);
  background-attachment: fixed;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.3; }

p { margin: 0; }

a { color: inherit; text-decoration: none; }

code {
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: .88em;
  padding: 1px 6px;
  border-radius: 5px;
  background: var(--bg-sunken);
  border: 1px solid var(--border);
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 26px;
}
.wrap.narrow { max-width: 860px; }

.faint { color: var(--text-tertiary); }

/* ---------- 印章与徽标 ---------- */
.seal {
  width: 38px;
  height: 38px;
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  background: var(--accent);
  color: var(--text-inverse);
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1;
  box-shadow: 0 3px 10px var(--accent-soft);
}
.seal-sm { width: 30px; height: 30px; font-size: 15px; border-radius: 6px; }

.chip {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border-radius: 999px;
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: .02em;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  line-height: 1;
  padding: 11px 18px;
  cursor: pointer;
  transition: background var(--tr), color var(--tr), border-color var(--tr), transform var(--tr), box-shadow var(--tr);
  white-space: nowrap;
}
.btn-sm { padding: 8px 14px; font-size: 13px; }
.btn-lg { padding: 14px 24px; font-size: 15px; border-radius: 8px; }

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
  box-shadow: 0 4px 14px rgba(163, 58, 43, .22);
}
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(163, 58, 43, .26); }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  background: var(--bg-card);
  border-color: var(--border-strong);
  color: var(--text-primary);
}
.btn-ghost:hover { background: var(--bg-hover); border-color: var(--text-tertiary); }

.btn small { font-size: 12px; font-weight: 400; opacity: .8; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 243, 234, .86);
  backdrop-filter: saturate(150%) blur(12px);
  -webkit-backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--tr), box-shadow var(--tr), background var(--tr);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: 0 1px 0 rgba(43, 42, 38, .04), 0 6px 18px rgba(43, 42, 38, .05);
}
.header-inner {
  height: 70px;
  display: flex;
  align-items: center;
  gap: 18px;
}
.brand { display: flex; align-items: center; gap: 11px; min-width: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong {
  font-family: var(--font-serif);
  font-size: 16.5px;
  letter-spacing: .12em;
}
.brand-text em {
  font-style: normal;
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--text-tertiary);
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 14px;
  color: var(--text-secondary);
}
.site-nav > a { position: relative; padding: 4px 0; transition: color var(--tr); }
.site-nav > a:hover { color: var(--text-primary); }
.site-nav > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transition: width var(--tr);
}
.site-nav > a:not(.btn):hover::after { width: 100%; }
.nav-cta { margin-left: 4px; color: var(--text-inverse); }
.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 40px; height: 36px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--bg-card);
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.nav-toggle span {
  display: block;
  width: 17px; height: 1.6px;
  background: var(--text-secondary);
  transition: transform var(--tr), opacity var(--tr);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.6px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding: 76px 0 64px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 55% at 78% 20%, rgba(163, 58, 43, .05), transparent 70%),
    radial-gradient(50% 50% at 10% 90%, rgba(74, 111, 165, .04), transparent 70%);
}
.hero-watermark {
  position: absolute;
  right: -2vw;
  top: -6vh;
  font-family: var(--font-serif);
  font-size: min(46vw, 560px);
  line-height: 1;
  color: rgba(43, 42, 38, .035);
  user-select: none;
}
.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: .16em;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}
.eyebrow .dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(34px, 4.1vw, 54px);
  line-height: 1.22;
  letter-spacing: .03em;
  margin-bottom: 18px;
}
.hero h1 .accent { color: var(--accent); }
.hero .lead {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text-secondary);
  max-width: 33em;
}
.hero-points {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.hero-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text-secondary);
}
.hero-points i {
  width: 15px; height: 15px;
  margin-top: 5px;
  flex: none;
  border-radius: 3px;
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  position: relative;
}
.hero-points i::after {
  content: "";
  position: absolute;
  left: 4px; top: 3.5px;
  width: 6px; height: 3.5px;
  border-left: 1.6px solid var(--accent);
  border-bottom: 1.6px solid var(--accent);
  transform: rotate(-45deg);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
  font-size: 12.5px;
  color: var(--text-tertiary);
}
.hero-meta .sep { opacity: .5; }

/* 窗口框 + 截图位 */
.window {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.window-bar {
  height: 38px;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px;
  background: var(--bg-stripe);
  border-bottom: 1px solid var(--border);
}
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot-r { background: #c9645a; }
.dot-y { background: #d3a44e; }
.dot-g { background: #7ea86f; }
.window-title {
  margin-left: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--text-tertiary);
  font-family: var(--font-serif);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.slot {
  position: relative;
  background: var(--bg-sunken);
  overflow: hidden;
}
.slot img {
  position: relative;
  z-index: 2;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.shot-placeholder {
  position: absolute;
  inset: 10px;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  color: var(--text-tertiary);
  text-align: center;
  padding: 14px;
  background:
    repeating-linear-gradient(45deg, transparent 0 13px, rgba(163, 58, 43, .045) 13px 14px),
    linear-gradient(150deg, var(--bg-stripe), var(--bg-sunken));
}
.ph-mark {
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--text-secondary);
}
.ph-name {
  font-family: "Cascadia Mono", Consolas, monospace;
  font-size: 11.5px;
  color: var(--accent);
  opacity: .85;
}
.ph-size { font-size: 11.5px; opacity: .8; }

.hero-slot { aspect-ratio: 16 / 10; }
.hero-shot figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--text-tertiary);
  text-align: center;
  letter-spacing: .04em;
}

/* ---------- 数据条 ---------- */
.stats {
  border-top: 1px dashed var(--border-strong);
  border-bottom: 1px dashed var(--border-strong);
  background: var(--bg-stripe);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding-top: 26px;
  padding-bottom: 26px;
}
.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  align-items: flex-start;
  padding-left: 16px;
  border-left: 2px solid var(--accent-border);
}
.stat b {
  font-family: var(--font-serif);
  font-size: 30px;
  line-height: 1.1;
  color: var(--accent);
  font-weight: 600;
}
.stat span { font-size: 12.5px; color: var(--text-tertiary); letter-spacing: .04em; }

/* ---------- 通用 section ---------- */
.section { padding: 78px 0; }
.section-alt {
  background: var(--bg-stripe);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head { max-width: 720px; margin-bottom: 38px; }
.section-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(25px, 2.4vw, 33px);
  letter-spacing: .03em;
  margin-bottom: 12px;
}
.section-head h2::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin-top: 14px;
  border-radius: 2px;
  background: var(--accent);
  opacity: .8;
}
.section-sub {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.9;
}

/* ---------- 卡片 ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.card:hover { box-shadow: var(--shadow-lg); border-color: var(--border-strong); }

/* ---------- 功能网格 ---------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.feature {
  padding: 22px 20px 24px;
  position: relative;
  overflow: hidden;
}
.feature::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 2px; height: 100%;
  background: linear-gradient(180deg, var(--accent), transparent 70%);
  opacity: 0;
  transition: opacity var(--tr);
}
.feature:hover::before { opacity: .55; }
.feature:hover { transform: translateY(-3px); }
.f-index {
  display: block;
  font-family: var(--font-serif);
  font-size: 12.5px;
  letter-spacing: .12em;
  color: var(--accent);
  margin-bottom: 10px;
}
.feature h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  letter-spacing: .02em;
  margin-bottom: 9px;
}
.feature p { font-size: 13.5px; line-height: 1.85; color: var(--text-secondary); }

/* ---------- 截图网格 ---------- */
.shot-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.shot-card { padding: 10px; }
.shot-card .slot { aspect-ratio: 16 / 10; border-radius: 7px; }
.shot-card figcaption {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 8px 6px;
}
.shot-card figcaption b {
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: .03em;
}
.shot-card figcaption span { font-size: 12.5px; color: var(--text-tertiary); }

/* ---------- 工作流步骤 ---------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  counter-reset: step;
}
.step {
  position: relative;
  padding: 20px 16px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.step::after {
  content: "";
  position: absolute;
  right: -8px;
  top: 42px;
  width: 8px;
  height: 1px;
  background: var(--border-strong);
}
.step:last-child::after { display: none; }
.step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  margin-bottom: 12px;
  border-radius: 6px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 14px;
}
.step h3 {
  font-family: var(--font-serif);
  font-size: 15px;
  margin-bottom: 7px;
  letter-spacing: .02em;
}
.step p { font-size: 12.8px; line-height: 1.8; color: var(--text-secondary); }

.workflow-note {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 22px;
}
.note-item {
  border-left: 2px solid var(--accent-border);
  padding: 4px 0 4px 14px;
}
.note-item h4 {
  font-family: var(--font-serif);
  font-size: 14px;
  margin-bottom: 5px;
  letter-spacing: .03em;
}
.note-item p { font-size: 13px; line-height: 1.8; color: var(--text-secondary); }

/* ---------- 双栏 ---------- */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.col-title {
  font-family: var(--font-serif);
  font-size: clamp(23px, 2.1vw, 28px);
  letter-spacing: .03em;
  margin-bottom: 20px;
  line-height: 1.45;
}
.layers { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 16px; }
.layers li {
  padding: 16px 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.layer-tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--accent);
  margin-bottom: 4px;
}
.layers b {
  display: block;
  font-family: var(--font-serif);
  font-size: 15.5px;
  margin-bottom: 5px;
  letter-spacing: .02em;
}
.layers p { font-size: 13.2px; line-height: 1.85; color: var(--text-secondary); }

.export-list { display: flex; flex-direction: column; gap: 14px; }
.export { padding: 18px 20px; position: relative; }
.export h3 { font-family: var(--font-serif); font-size: 16px; margin-bottom: 6px; }
.export p { font-size: 13.2px; line-height: 1.85; color: var(--text-secondary); padding-right: 74px; }
.export .tag {
  position: absolute;
  right: 16px;
  top: 18px;
  font-size: 11.5px;
  color: var(--text-tertiary);
  border: 1px solid var(--border);
  background: var(--bg-sunken);
  border-radius: 999px;
  padding: 1px 9px;
}

/* ---------- 下载 ---------- */
.download-grid {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  gap: 22px;
  align-items: start;
}
.download-card { padding: 26px 26px 22px; }
.dl-head { display: flex; align-items: flex-start; gap: 14px; }
.win-icon { color: var(--accent); flex: none; margin-top: 4px; }
.dl-head h3 {
  font-family: var(--font-serif);
  font-size: 21px;
  letter-spacing: .02em;
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.dl-head h3 small {
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 400;
  color: var(--accent);
  border: 1px solid var(--accent-border);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 1px 8px;
}
.dl-head p { font-size: 13px; color: var(--text-tertiary); margin-top: 4px; }

.dl-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 22px 0 20px;
}
.dl-btn { width: 100%; padding: 15px 16px; flex-direction: column; gap: 3px; }
.dl-btn small { opacity: .75; }

.dl-meta {
  list-style: none;
  margin: 0;
  padding: 16px 0 0;
  border-top: 1px dashed var(--border-strong);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.dl-meta li { display: flex; gap: 12px; font-size: 13px; line-height: 1.7; }
.dl-meta span {
  flex: none;
  width: 68px;
  color: var(--text-tertiary);
  letter-spacing: .04em;
}
.dl-meta b { font-weight: 500; color: var(--text-secondary); }

.dl-side { display: flex; flex-direction: column; gap: 14px; }
.tip { padding: 18px 18px 16px; }
.tip h4 {
  font-family: var(--font-serif);
  font-size: 14.5px;
  letter-spacing: .03em;
  margin-bottom: 6px;
}
.tip p { font-size: 13px; line-height: 1.8; color: var(--text-secondary); }

/* ---------- 客服 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: start;
}
.qr-card {
  padding: 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.qr { aspect-ratio: 1 / 1; border-radius: 8px; }
.qr-card b { font-family: var(--font-serif); font-size: 14.5px; letter-spacing: .03em; margin-top: 4px; }
.qr-card .faint { font-size: 12px; }

.contact-list { display: flex; flex-direction: column; gap: 0; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 13px 2px;
  border-bottom: 1px dashed var(--border-strong);
  font-size: 14px;
}
.contact-item:first-child { border-top: 1px dashed var(--border-strong); }
.c-label { width: 64px; flex: none; color: var(--text-tertiary); font-size: 13px; letter-spacing: .06em; }
.c-value { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.copy {
  font-family: inherit;
  font-size: 11.5px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-border);
  border-radius: 999px;
  padding: 1px 10px;
  cursor: pointer;
  transition: background var(--tr), color var(--tr);
}
.copy:hover { background: var(--accent); color: var(--text-inverse); }

.contact-note {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--text-tertiary);
  padding-left: 14px;
  border-left: 2px solid var(--border);
}

/* ---------- FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: 10px; }
.faq details {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0 18px;
  transition: border-color var(--tr), box-shadow var(--tr);
}
.faq details[open] { border-color: var(--border-strong); box-shadow: var(--shadow-lg); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 26px 16px 0;
  position: relative;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: .02em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 2px; top: 24px;
  width: 8px; height: 8px;
  border-right: 1.6px solid var(--text-tertiary);
  border-bottom: 1.6px solid var(--text-tertiary);
  transform: rotate(45deg);
  transition: transform var(--tr);
}
.faq details[open] summary::after { transform: rotate(-135deg); }
.faq details p {
  padding: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--text-secondary);
  max-width: 62em;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--bg-sunken);
  border-top: 1px solid var(--border);
  padding: 34px 0 26px;
}
.footer-inner { display: flex; flex-direction: column; gap: 20px; }
.footer-brand { display: flex; align-items: center; gap: 11px; }
.footer-brand div { display: flex; flex-direction: column; line-height: 1.4; }
.footer-brand strong { font-family: var(--font-serif); font-size: 15px; letter-spacing: .06em; }
.footer-brand span { font-size: 12px; color: var(--text-tertiary); }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; color: var(--text-secondary); }
.footer-links a { transition: color var(--tr); }
.footer-links a:hover { color: var(--accent); }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px;
  padding-top: 16px;
  border-top: 1px dashed var(--border-strong);
  font-size: 12px;
  color: var(--text-secondary);
}

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 520ms cubic-bezier(.22, .61, .36, 1), transform 520ms cubic-bezier(.22, .61, .36, 1);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn-primary:hover, .feature:hover { transform: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid { gap: 40px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .step::after { display: none; }
  .two-col { gap: 34px; }
  .download-grid { grid-template-columns: 1fr; }
  .dl-side { display: grid; grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .section { padding: 60px 0; }
  .hero { padding: 52px 0 44px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { order: 1; }
  .hero-shot { order: 2; }
  .hero-watermark { font-size: 74vw; right: -14vw; top: -4vh; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); row-gap: 18px; }
  .shot-grid { grid-template-columns: 1fr; }
  .two-col { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .qr-card { max-width: 300px; }
  .dl-side { grid-template-columns: 1fr; }
  .workflow-note { grid-template-columns: 1fr; }

  .nav-toggle { display: flex; }
  .site-nav {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    margin: 0;
    padding: 10px 26px 18px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    background: var(--bg-page);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav > a { padding: 11px 4px; border-bottom: 1px dashed var(--border); }
  .site-nav > a:last-child { border-bottom: 0; }
  .nav-cta { margin: 10px 0 0; justify-content: center; }
  .site-header { background: rgba(247, 243, 234, .96); }
}

@media (max-width: 560px) {
  body { font-size: 14.5px; }
  .wrap { padding: 0 18px; }
  .brand-text em { display: none; }
  .hero h1 { font-size: 31px; }
  .hero .lead { font-size: 15px; }
  .hero-actions .btn { width: 100%; }
  .feature-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .dl-actions { grid-template-columns: 1fr; }
  .export p { padding-right: 0; }
  .export .tag { position: static; display: inline-block; margin-top: 8px; }
  .section-head h2 { font-size: 23px; }
}