/* ============================================================
   刘佳晨 · 山西 GEO 优化顾问
   设计语言：参考 Xiaomi MiMo Home
   - 暖白底 #fcfaf8 / 暖米灰卡 #f3ede8 / 暖灰边框 #f0ebe5
   - 标题 400 常规字重（不用粗体）
   - Hero 居中、区块标题居中 40px
   - 胶囊按钮（999px）、圆角 16-24px
   - reveal 位移 60px、0.8s、cubic-bezier(.16,1,.3,1)
   ============================================================ */

:root {
  /* 颜色（与 MiMo 一致） */
  --bg: #fcfaf8;
  --bg-card: #f3ede8;
  --border: #f0ebe5;
  --border-strong: #e3dbd2;
  --text-primary: #000000;
  --text-secondary: #666666;
  --text-muted: #999999;
  --ink: #000000;
  --ink-soft: #1a1a1a;
  --muted: #666666;
  --muted-light: #999999;
  --paper: #fcfaf8;
  --paper-2: #f7f3ef;
  --paper-3: #f3ede8;
  --line: #f0ebe5;
  --line-strong: #e3dbd2;
  --white: #ffffff;
  --accent: #000000;        /* MiMo 几乎用纯黑作强调 */
  --accent-soft: #f3ede8;
  --gold: #000000;
  --gold2: #666666;
  --paper2: #f7f3ef;

  /* 字体 */
  --font-main: "PingFang SC", -apple-system, "MiSans", "HarmonyOS Sans SC",
               "Source Han Sans SC", "Noto Sans SC", system-ui, "Microsoft YaHei", sans-serif;
  --sans: var(--font-main);
  --serif: var(--font-main);

  /* 布局 */
  --page: min(1275px, calc(100% - 56px));
  --radius-sm: 6px;
  --radius: 12px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .04);
  --shadow: 0 4px 16px rgba(0, 0, 0, .06);

  /* 动效 */
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 16px;
  line-height: normal;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
  border-radius: 4px;
}
img { max-width: 100%; height: auto; display: block; }

/* ============ 顶部导航（吸顶、半透明） ============ */
.site-header {
  width: 100%;
  height: 64px;
  padding-inline: max(28px, calc((100vw - 1275px) / 2));
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
  background: rgba(252, 250, 248, .82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: -.01em;
  color: var(--text-primary);
}
.brand small {
  margin-left: 2px;
  color: var(--text-muted);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.brand-dot {
  width: 18px; height: 18px;
  border-radius: 5px;
  background: var(--text-primary);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 10px;
  font-weight: 600;
}
.brand-dot::after { content: "M"; }

nav {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 400;
  color: var(--text-secondary);
}
nav a {
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  transition: background .2s, color .2s;
}
nav a:hover { background: rgba(0, 0, 0, .04); color: var(--text-primary); }

.nav-cta {
  margin-left: 8px;
  height: 36px;
  padding: 0 16px !important;
  display: inline-flex !important;
  align-items: center;
  gap: 6px;
  border-radius: 999px !important;
  background: var(--text-primary) !important;
  color: #fff !important;
  font-size: 13.5px !important;
  font-weight: 400;
  transition: transform .2s, box-shadow .2s !important;
}
.nav-cta:hover {
  background: var(--text-primary) !important;
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
}
.nav-cta span { opacity: .6; }

/* 移动端汉堡 */
.nav-burger {
  display: none;
  width: 38px; height: 38px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--text-primary);
}
.nav-burger span {
  display: block;
  width: 18px; height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  flex-direction: column;
  width: calc(100% - 24px);
  margin: 8px auto 0;
  padding: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow);
  position: relative;
  z-index: 49;
}
.mobile-nav a {
  padding: 13px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: background .2s;
}
.mobile-nav a:hover { background: rgba(0, 0, 0, .04); }
.mobile-nav-cta {
  margin-top: 4px;
  color: #fff !important;
  background: var(--text-primary) !important;
  border-radius: 999px !important;
  text-align: center;
}

/* ============ Hero（居中布局，MiMo 式极简） ============ */
.hero {
  width: var(--page);
  margin: 0 auto;
  padding: 64px 0 0;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  gap: 0;
}

/* 眉标：一行小字 */
.hero-eyebrow {
  margin: 0 0 28px;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 13.5px;
  letter-spacing: .02em;
}

/* 副标题：一句话 */
.hero-sub {
  max-width: 560px;
  margin: 20px 0 0;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}

.hero-actions { margin-top: 32px; }

/* 描边按钮 */
.button-outline {
  background: transparent;
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
}
.button-outline:hover {
  background: rgba(0, 0, 0, .04);
  transform: translateY(-1px);
}

/* 大标题：48px，字重 400（MiMo 特色） */
h1 {
  margin: 0;
  font-family: var(--font-main);
  font-size: clamp(36px, 4.4vw, 52px);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--text-primary);
}
h1 em { font-style: normal; color: var(--text-primary); }
h1 strong { font-weight: 400; }

/* ============ 打字机效果（原文隐藏占位，JS 逐字显示） ============ */
.typing-target {
  display: grid;
  justify-items: center;
  min-height: 1.2em;
}
.typing-sizer {
  grid-area: 1 / 1;
  opacity: 0;
  user-select: none;
  pointer-events: none;
}
.typing-live {
  grid-area: 1 / 1;
  white-space: pre-wrap;
}
.typing-live::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: .9em;
  margin-left: 3px;
  background: var(--text-primary);
  vertical-align: baseline;
  animation: cursor-blink 1s step-end infinite;
}
html.typing-done .typing-live::after { display: none; }
.typing-cursor { display: none; }

@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ============ 粒子画布（在 hero banner 上） ============ */
.particle-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
  mix-blend-mode: screen;
  opacity: .9;
}

/* ============ 自定义光标 ============ */
@media (pointer: fine) {
  body.custom-cursor-on { cursor: none; }
  body.custom-cursor-on a,
  body.custom-cursor-on button,
  body.custom-cursor-on summary { cursor: none; }

  .custom-cursor {
    position: fixed;
    left: 0; top: 0;
    width: 22px; height: 22px;
    border: 1.5px solid var(--text-primary);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width .25s var(--ease), height .25s var(--ease),
                border-color .25s, background .25s, opacity .25s;
    will-change: transform;
  }
  .custom-cursor::after {
    content: "";
    position: absolute;
    left: 50%; top: 50%;
    width: 4px; height: 4px;
    border-radius: 50%;
    background: var(--text-primary);
    transform: translate(-50%, -50%);
  }
  .custom-cursor.is-hover {
    width: 40px; height: 40px;
    background: rgba(0, 0, 0, .06);
  }
  .custom-cursor.is-hidden { opacity: 0; }
}

/* 打字机光标 */
.typing-cursor {
  display: inline-block;
  width: 2px;
  height: .85em;
  margin-left: 3px;
  background: var(--text-primary);
  vertical-align: baseline;
  animation: cursor-blink 1s step-end infinite;
}
@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-lede {
  max-width: 620px;
  margin: 0;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.9;
}
.hero-lede strong { color: var(--text-primary); font-weight: 500; }

.geo-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: 999px;
  background: var(--bg-card);
  border: none;
  color: var(--text-secondary);
  font-size: 13px;
}
.geo-badge svg { width: 13px; height: 13px; color: var(--text-primary); flex: none; }
.geo-badge strong { color: var(--text-primary); font-weight: 500; }

/* 按钮组：胶囊形 */
.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  min-width: 180px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0;
  transition: transform .2s, box-shadow .2s, background .2s;
}
.button-dark {
  background: var(--text-primary);
  border: 1px solid var(--text-primary);
  color: #fff;
}
.button-dark:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, .2);
}
.button-dark span { opacity: .55; }

.under-link {
  display: inline-flex;
  align-items: center;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 400;
  transition: background .2s, transform .2s;
}
.under-link:hover { background: rgba(0, 0, 0, .04); transform: translateY(-1px); }

/* Hero 大 banner（使用 MiMo 背景图） */
.hero-banner {
  position: relative;
  width: 100%;
  margin-top: 48px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  max-height: 600px;
  background: #111;
}
.hero-banner > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: absolute;
  inset: 0;
}
.hero-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, .08) 0%, rgba(0, 0, 0, .32) 100%);
  pointer-events: none;
}
.hero-banner-card {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  width: min(440px, calc(100% - 64px));
  padding: 30px 34px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  text-align: left;
}

.answer-card {
  width: min(440px, calc(100% - 64px));
  padding: 32px 36px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  text-align: left;
}
.answer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .12em;
  text-transform: uppercase;
}
.answer-top i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--text-primary);
}
.answer-card > p, .hero-banner-card > p {
  margin: 22px 0 20px;
  font-size: 19px;
  line-height: 1.65;
  color: var(--text-primary);
  font-weight: 400;
}
.answer-card b, .hero-banner-card b { color: var(--text-primary); font-weight: 500; }
.answer-cite {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.answer-cite span {
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 10px;
}
.answer-cite small { margin-left: auto; color: var(--text-muted); font-size: 11px; }

/* banner 上的浮动标签（MiMo 风格：半透明胶囊） */
.signal {
  position: absolute;
  z-index: 3;
  padding: 9px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .1);
  border: 1px solid rgba(255, 255, 255, .16);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: rgba(255, 255, 255, .65);
  font-size: 11px;
  line-height: 1.5;
  letter-spacing: .04em;
}
.signal b { display: block; color: #fff; font-size: 13px; font-weight: 500; letter-spacing: 0; }
.signal-a { top: 28px; right: 28px; }
.signal-b { bottom: 32px; left: 28px; }
.signal-c { right: 28px; bottom: 110px; }

.orbit-line, .visual-mark { display: none; }

/* Hero 底部条 */
.hero-strip {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 40px;
  padding: 20px 0 40px;
  border-top: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 14px;
  text-align: left;
}
.hero-strip div { display: flex; align-items: center; gap: 10px; }
.hero-strip b { color: var(--text-primary); font-weight: 400; }
.hero-strip i { color: var(--text-muted); font-style: normal; }

/* ============ 通用区块（居中标题） ============ */
.section {
  width: var(--page);
  margin: 0 auto;
  padding: 72px 0;
  position: relative;
}

.about { display: block; }

.section-index { display: none; } /* MiMo 不用侧边编号 */

.section-label {
  display: block;
  text-align: center;
  margin: 0 0 12px;
  color: var(--text-muted);
  font-size: 13px;
  letter-spacing: .02em;
}

.about-main h2,
.section-head h2,
.method-content > h2,
.deliverable-copy h2,
.faq-content > h2 {
  text-align: center;
  margin: 0 auto 8px;
  font-family: var(--font-main);
  font-size: clamp(28px, 3.2vw, 40px);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -.01em;
  color: var(--text-primary);
  max-width: 760px;
}

.about-main > p:not(.section-label) {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 16px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.9;
}
.about-main strong { color: var(--text-primary); font-weight: 500; }

/* 个人卡片：水平布局（MiMo 的卡片风格） */
.profile-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  align-items: center;
  max-width: 820px;
  margin: 40px auto 0;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  border: none;
  text-align: left;
}
.profile-photo {
  width: 100%;
  border-radius: var(--radius);
}
.profile-card dl { margin: 0; display: grid; gap: 0; }
.profile-card dl div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.profile-card dl div:first-child { padding-top: 0; }
.profile-card dl div:last-child { border-bottom: 0; padding-bottom: 0; }
.profile-card dt { color: var(--text-secondary); }
.profile-card dd { margin: 0; color: var(--text-primary); font-weight: 500; text-align: right; }

/* ============ 服务区块 ============ */
.section-dark {
  padding: 72px max(28px, calc((100vw - 1275px) / 2));
  background: transparent;
  border: none;
  color: var(--text-primary);
}

.section-head {
  display: block;
  text-align: center;
  margin-bottom: 44px;
}
.section-head > p {
  max-width: 560px;
  margin: 12px auto 0;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}
.section-head h2 { margin-bottom: 0; }

.service-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  padding: 0;
  background: var(--bg-card);
  border: none;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
  text-align: left;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .08);
}
/* 卡片配图 */
.service-media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: #111;
}
.service-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform .5s var(--ease);
}
.service-card:hover .service-media img { transform: scale(1.04); }

/* 卡片文字区 */
.service-top {
  display: flex;
  justify-content: space-between;
  padding: 22px 26px 0;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .02em;
}
.service-card h3 {
  margin: 12px 26px 10px;
  font-family: var(--font-main);
  font-size: 22px;
  font-weight: 400;
  letter-spacing: -.01em;
  color: var(--text-primary);
}
.service-card > p {
  margin: 0 26px;
  color: var(--text-secondary);
  font-size: 14.5px;
  line-height: 1.8;
  flex: 1;
}
.service-card ul {
  margin: 18px 26px 26px;
  padding: 16px 0 0;
  border-top: 1px solid var(--border);
  list-style: none;
}
.service-card li {
  padding: 5px 0;
  color: var(--text-secondary);
  font-size: 13.5px;
}
.service-card li::before {
  content: "·";
  margin-right: 8px;
  color: var(--text-muted);
}

/* ============ 方法步骤 ============ */
.method-content { max-width: 1100px; margin: 0 auto; }

.steps {
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  list-style: none;
  text-align: left;
}
.steps li {
  min-height: 190px;
  padding: 26px 24px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
}
.steps b {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 400;
}
.steps h3 {
  margin: 40px 0 10px;
  font-family: var(--font-main);
  font-size: 19px;
  font-weight: 400;
  letter-spacing: -.01em;
}
.steps p { margin: 0; color: var(--text-secondary); font-size: 14px; line-height: 1.8; }

/* ============ 交付物 ============ */
.deliverables {
  padding: 72px max(28px, calc((100vw - 1275px) / 2));
  display: block;
  background: transparent;
  border: none;
}
.deliverable-copy { text-align: center; margin-bottom: 40px; }
.deliverable-copy h2 { margin-bottom: 12px; }
.deliverable-copy > p:last-child {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.8;
}
.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.deliverable-grid div {
  min-height: 150px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  border: none;
  border-radius: var(--radius-lg);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.deliverable-grid div:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .08);
}
.deliverable-grid span {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 400;
}
.deliverable-grid b {
  font-family: var(--font-main);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: -.01em;
  color: var(--text-primary);
}

/* ============ FAQ ============ */
.faq-content { max-width: 860px; margin: 0 auto; }

.faq-list {
  margin-top: 36px;
  border-top: 1px solid var(--border);
}
.faq-list details { border-bottom: 1px solid var(--border); }
.faq-list summary {
  min-height: 72px;
  display: grid;
  grid-template-columns: 40px 1fr 24px;
  align-items: center;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-main);
  font-size: 17px;
  font-weight: 400;
  letter-spacing: -.01em;
  color: var(--text-primary);
  transition: background .2s;
}
.faq-list summary:hover { background: rgba(0, 0, 0, .02); }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span {
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 400;
}
.faq-list summary i {
  color: var(--text-secondary);
  font-style: normal;
  font-size: 20px;
  font-weight: 300;
  transition: transform .3s var(--ease);
}
.faq-list details[open] summary i { transform: rotate(45deg); }
.faq-list details p {
  max-width: 700px;
  margin: 0 40px 26px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.95;
}

/* ============ 联系区（MiMo 风格：暖白 + 居中大字） ============ */
.contact {
  padding: 96px max(28px, calc((100vw - 1275px) / 2)) 40px;
  background: var(--bg-card);
  color: var(--text-primary);
  text-align: center;
}
.contact > p {
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: .01em;
}
.contact h2 {
  margin: 20px 0 32px;
  font-family: var(--font-main);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -.02em;
}
.contact > a {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 32px;
  border-radius: 999px;
  background: var(--text-primary);
  color: #fff;
  font-family: var(--font-main);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 400;
  transition: transform .2s, box-shadow .2s;
}
.contact > a:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .2);
}
.contact > a span { transition: transform .25s; }
.contact > a:hover span { transform: translate(3px, -3px); }

.contact-lines {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 28px;
  margin-top: 28px;
  padding: 0;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
}
.contact-lines a {
  color: var(--text-primary);
  border-bottom: 1px solid var(--text-primary);
  padding-bottom: 1px;
}

.contact-note {
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: .02em;
  text-align: left;
}

/* ============ 页脚 ============ */
.site-footer {
  padding: 52px max(28px, calc((100vw - 1275px) / 2));
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 32px;
  align-items: center;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  color: var(--text-primary);
}
.site-footer > p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
}
.site-footer nav {
  font-size: 14px;
  color: var(--text-secondary);
  justify-content: flex-end;
  gap: 2px;
}
.site-footer nav a:hover { background: rgba(0, 0, 0, .04); }
.site-footer > small {
  grid-column: 1 / -1;
  padding-top: 26px;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 12px;
  letter-spacing: .02em;
}
/* 版权 + 备案合并为一行 */
.site-footer > small.site-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
}
.site-legal a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color .25s var(--ease);
}
.site-legal a:hover { color: var(--text-secondary); }
.site-legal img {
  width: 15px;
  height: 15px;
  display: block;
  flex: none;
  border-radius: 2px;
  opacity: .8;
  transition: opacity .25s var(--ease);
}
.site-legal a:hover img { opacity: 1; }
@media (max-width: 700px) {
  .site-footer > small.site-legal { gap: 8px 16px; font-size: 11.5px; }
  .site-legal img { width: 14px; height: 14px; }
}
.footer-brand { color: var(--text-primary); }
.footer-brand small { color: var(--text-muted); }

/* ============ 页脚 GEO 信号条：llms.txt / robots.txt 声明 ============ */
.geo-signals {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.geo-signals-label {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--text-muted);
  margin-right: 4px;
}
.geo-signal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 12.5px;
  line-height: 1.4;
  text-decoration: none;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}
.geo-signal:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}
.geo-signal b {
  color: var(--text-primary);
  font-weight: 500;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  font-size: 12px;
}
.geo-signal-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #0a7d43;
  flex: none;
  box-shadow: 0 0 0 3px rgba(10, 125, 67, .12);
}
@media (max-width: 860px) {
  .geo-signals { gap: 8px; padding-top: 20px; }
  .geo-signal { font-size: 12px; padding: 7px 13px; }
  .geo-signals-label { width: 100%; margin-bottom: 2px; }
}

/* ============ 滚动渐入（MiMo 的 reveal：60px / 0.8s） ============ */
html.motion-ready .reveal {
  opacity: 0;
  transform: translateY(60px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
html.motion-ready .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 旧装饰全部停用 */
.ambient-canvas { display: none !important; }
body::before, body::after { display: none !important; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  :root { --page: calc(100% - 48px); }
  .hero-banner { max-height: 420px; }
  .service-list { grid-template-columns: 1fr; }
  .service-card { padding: 28px 26px; }
  .service-card h3 { margin-top: 24px; }
  .service-card > p { min-height: auto; }
  .steps { grid-template-columns: 1fr 1fr; }
  .deliverable-grid { grid-template-columns: 1fr 1fr; }
  .profile-card { grid-template-columns: 1fr; max-width: 520px; }
  .profile-photo { max-width: 240px; }
}

@media (max-width: 720px) {
  :root { --page: calc(100% - 32px); }

  .site-header { height: 56px; padding-inline: 16px; }
  .brand small { display: none; }
  .site-header > nav { display: none; }
  .nav-burger { display: flex; }
  .mobile-nav.open { display: flex; }

  .hero { padding: 40px 0 0; }
  .hero-eyebrow { margin-bottom: 22px; font-size: 12px; padding: 6px 13px; }
  h1 { font-size: 30px; line-height: 1.25; }
  .hero-sub { font-size: 15px; margin-top: 16px; }
  .hero-actions { margin-top: 26px; flex-direction: column; align-items: stretch; gap: 10px; }
  .button, .button-outline, .under-link { width: 100%; min-width: 0; }
  .hero-banner { margin-top: 32px; aspect-ratio: 4 / 3; max-height: none; }
  .hero-banner-card, .answer-card { width: calc(100% - 32px); padding: 22px 20px; }
  .hero-banner-card > p, .answer-card > p { font-size: 16px; }
  .signal { display: none; }

  .hero-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 18px 0 28px;
  }
  .hero-strip div { flex-wrap: wrap; gap: 6px; }

  .section, .deliverables { padding: 56px 0; }
  .section-dark, .contact { padding: 56px 16px; }

  .about-main h2, .section-head h2, .method-content > h2,
  .deliverable-copy h2, .faq-content > h2 { font-size: 26px; }

  .section-label { font-size: 12px; }
  .section-head { margin-bottom: 32px; }
  .section-head > p { font-size: 14.5px; }

  .profile-card { padding: 20px; margin-top: 28px; }
  .profile-card dl div { font-size: 13.5px; }

  .steps { grid-template-columns: 1fr; gap: 14px; }
  .steps li { min-height: auto; padding: 22px; }
  .steps h3 { margin-top: 24px; }

  .deliverable-grid { grid-template-columns: 1fr; gap: 14px; }
  .deliverable-grid div { min-height: 110px; }

  .faq-list summary { grid-template-columns: 30px 1fr 20px; font-size: 15.5px; min-height: 64px; }
  .faq-list details p { margin-left: 30px; margin-bottom: 22px; font-size: 14.5px; }

  .contact { padding-top: 64px; }
  .contact h2 { font-size: 40px; margin: 16px 0 28px; }
  .contact > a { padding: 14px 24px; font-size: 18px; }
  .contact-lines { flex-direction: column; gap: 10px; }
  .contact-note { flex-direction: column; gap: 8px; margin-top: 32px; }

  .site-footer { grid-template-columns: 1fr; padding: 36px 16px; }
  .site-footer nav { display: flex; justify-content: flex-start; flex-wrap: wrap; }
  .site-footer > small { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  html.motion-ready .reveal { opacity: 1; transform: none; }
  .typing-cursor { display: none; }
}