/* ==========================================================================
   Look Look Dev — 设计系统
   色板与字体沿用 Claude Design 稿（design/*.dc.html），此处抽成变量与类。
   ========================================================================== */

:root {
  /* 底色与表面 */
  --bg:            #05060A;
  --bg-alt:        #0B0E16;
  --bg-footer:     #07080D;
  --surface:       rgba(16, 19, 29, .78);
  --surface-solid: #10131D;

  /* 主色 */
  --primary:       #8B9DFF;
  --primary-lift:  #A9B6FF;
  --grad-a:        #6E7CFF;
  --grad-b:        #B06EFF;
  --green:         #6EE7A8;
  --teal:          #5EEAD4;
  --violet:        #B08DFF;

  /* 文字 */
  --ink:           #EEF0F8;
  --ink-body:      #A7AEC2;
  --ink-muted:     #7C8398;
  --ink-faint:     #636B80;
  --ink-faintest:  #4C5266;

  /* 描边 */
  --line:          rgba(238, 240, 248, .09);
  --line-strong:   rgba(238, 240, 248, .16);
  --line-primary:  rgba(139, 157, 255, .45);

  /* 字体 */
  /* 中文优先走系统字体，Noto 到货后再无缝替换 —— 首屏不必等 124KB 的字体 CSS */
  --sans:  'Space Grotesk', 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB',
           'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --serif: 'Noto Serif SC', 'Songti SC', 'STSong', 'SimSun', serif;
  --display: 'Instrument Serif', 'Noto Serif SC', 'Songti SC', serif;

  /* 版心与间距 */
  --shell:   1240px;
  --gutter:  48px;
  --nav-h:   66px;
  --section: 110px;

  --radius:    16px;
  --radius-sm: 10px;
}

/* --------------------------------------------------------------------------
   Reset
   -------------------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }

html {
  background: var(--bg);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { max-width: 100%; }
h1, h2, h3, h4, p { margin: 0; }
a { color: var(--primary); text-decoration: none; transition: color .18s ease; }
a:hover { color: var(--primary-lift); }
::selection { background: var(--primary); color: var(--bg); }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--primary);
  color: var(--bg);
  padding: 12px 20px;
  font-weight: 600;
}
.skip-link:focus { left: 12px; top: 12px; color: var(--bg); }

/* --------------------------------------------------------------------------
   布局
   -------------------------------------------------------------------------- */

.shell { max-width: var(--shell); margin: 0 auto; }
.shell--narrow { max-width: 1080px; }

.section {
  padding: var(--section) var(--gutter);
  position: relative;
  /* 裁掉故意超出边界的 .glow 光晕，否则会撑出横向滚动条 */
  overflow: hidden;
}
.section--tight { padding-block: 84px; }
.section--alt   { background: var(--bg-alt); }
.section--line  { border-top: 1px solid var(--line); }

/* --------------------------------------------------------------------------
   排版
   -------------------------------------------------------------------------- */

.eyebrow {
  color: var(--primary);
  font-size: 12.5px;
  letter-spacing: .28em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.h1 {
  font-weight: 700;
  font-size: clamp(38px, 5.6vw, 80px);
  line-height: 1.04;
  letter-spacing: -.02em;
  text-wrap: pretty;
}
.h2 {
  font-weight: 700;
  font-size: clamp(28px, 3.6vw, 50px);
  line-height: 1.12;
  letter-spacing: -.01em;
  text-wrap: pretty;
}
.h3 {
  font-weight: 700;
  font-size: clamp(21px, 2.2vw, 25px);
  line-height: 1.25;
  letter-spacing: -.01em;
}

.h1 em, .h2 em { color: var(--primary); font-style: italic; font-family: var(--display); }

.gradient-text {
  background: linear-gradient(100deg, var(--primary), var(--grad-b) 55%, var(--teal));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  font-family: var(--serif);
  font-size: clamp(16px, 2vw, 19px);
  color: var(--ink-body);
  letter-spacing: .02em;
}
.body    { font-size: 15.5px; line-height: 1.78; color: var(--ink-muted); text-wrap: pretty; }
.body-lg { font-size: 16px;   line-height: 1.75; color: var(--ink-muted); text-wrap: pretty; }
.cn      { font-family: var(--sans); }
.cn-serif{ font-family: var(--serif); }
.muted   { color: var(--ink-muted); }
.faint   { color: var(--ink-faint); }

/* --------------------------------------------------------------------------
   按钮
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 15px 30px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .03em;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  transition: filter .18s ease, transform .18s ease, border-color .18s ease, color .18s ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  color: #FFF;
  box-shadow: 0 10px 40px rgba(110, 124, 255, .32);
}
.btn--primary:hover { color: #FFF; filter: brightness(1.14); transform: translateY(-2px); }

.btn--ghost {
  border-color: var(--line-strong);
  background: rgba(238, 240, 248, .03);
  color: var(--ink);
  font-weight: 500;
}
.btn--ghost:hover { border-color: var(--primary); color: var(--primary-lift); }

.btn--solid {
  background: var(--primary);
  color: var(--bg);
}
.btn--solid:hover { color: var(--bg); filter: brightness(1.14); }

.btn--sm { padding: 10px 22px; font-size: 13.5px; border-radius: 8px; }
.btn--block { display: flex; width: 100%; }

.btn-row {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}
.btn-row--center { justify-content: center; }

/* --------------------------------------------------------------------------
   导航
   -------------------------------------------------------------------------- */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 60;
  background: rgba(5, 6, 10, .74);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.nav__inner {
  max-width: var(--shell);
  margin: 0 auto;
  min-height: var(--nav-h);
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: baseline;
  color: var(--ink);
  flex-shrink: 0;
  white-space: nowrap;
}
.logo:hover { color: var(--ink); }
.logo__a { font-weight: 700; font-size: 19px; letter-spacing: .04em; }
.logo__b {
  font-weight: 700; font-size: 19px; letter-spacing: .04em;
  margin-left: -5px;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--primary);
}
.logo__dev { font-family: var(--display); font-style: italic; color: var(--primary); font-size: 18px; margin-left: 8px; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 13.5px;
  letter-spacing: .05em;
}
.nav__links a { color: var(--ink-body); }
.nav__links a:hover { color: var(--ink); }
.nav__links a.is-current {
  color: var(--ink);
  border-bottom: 1px solid var(--primary);
  padding-bottom: 2px;
}

.nav__toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  background: none;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
}
.nav__toggle svg { display: block; }
.nav__toggle .icon-close { display: none; }
.nav__toggle[aria-expanded="true"] .icon-open  { display: none; }
.nav__toggle[aria-expanded="true"] .icon-close { display: block; }

/* --------------------------------------------------------------------------
   卡片与网格
   -------------------------------------------------------------------------- */

.grid { display: grid; gap: 22px; }
.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(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  color: var(--ink);
  display: block;
  transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
a.card:hover {
  color: var(--ink);
  border-color: var(--line-primary);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(110, 124, 255, .15);
}
.card__icon {
  width: 42px; height: 42px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(110,124,255,.25), rgba(176,110,255,.25));
  border: 1px solid rgba(139, 157, 255, .35);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  margin-bottom: 20px;
}
.card__title { font-size: 17.5px; font-weight: 600; margin-bottom: 5px; }
.card__cn    { color: var(--primary); font-size: 13.5px; margin-bottom: 13px; }
.card__text  { color: var(--ink-muted); font-size: 14px; line-height: 1.7; }

/* 细分条目表（服务页 / 案例页的 1px 分隔列表） */
.slat {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.slat > div { background: var(--bg-alt); padding: 22px 28px; }
.section--alt .slat > div { background: var(--bg); }
.slat__title { font-weight: 600; font-size: 15px; margin-bottom: 4px; }
.slat__title span { color: var(--primary); font-weight: 500; }
.slat__text  { color: var(--ink-muted); font-size: 14px; line-height: 1.65; }

/* --------------------------------------------------------------------------
   小组件
   -------------------------------------------------------------------------- */

.pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(139, 157, 255, .35);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--primary-lift);
  background: rgba(110, 124, 255, .08);
}

.dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  animation: pulseDot 2.4s infinite;
}

.live-tag {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--green);
  white-space: nowrap;
}

.quote {
  border-left: 1px solid var(--primary);
  padding-left: 28px;
  max-width: 60ch;
}
.quote p {
  font-family: var(--display);
  font-style: italic;
  font-size: clamp(18px, 2.2vw, 21px);
  line-height: 1.6;
  color: var(--ink-body);
  margin-bottom: 10px;
}
.quote cite {
  color: var(--ink-faint);
  font-size: 13px;
  font-style: normal;
  letter-spacing: .08em;
}

.stat {
  background: var(--bg-alt);
  padding: 30px 28px;
}
.section--alt .stat { background: var(--bg); }
.stat__big  { font-family: var(--display); font-style: italic; color: var(--primary); font-size: 26px; margin-bottom: 10px; }
.stat__lede { font-weight: 600; font-size: 15px; margin-bottom: 4px; }
.stat__cn   { color: var(--ink-muted); font-size: 13.5px; }

/* 光晕背景 */
.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(48px);
  pointer-events: none;
  z-index: 0;
}
.section > .shell, .hero > .shell { position: relative; z-index: 1; }

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  padding: calc(var(--nav-h) + 104px) var(--gutter) 110px;
  overflow: hidden;
}
.hero--page {
  padding-bottom: 60px;
  background: radial-gradient(900px 480px at 50% -10%, rgba(139,157,255,.12), transparent 60%);
}
.hero__grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(238,240,248,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238,240,248,.035) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(900px 600px at 45% 30%, black, transparent 80%);
  mask-image: radial-gradient(900px 600px at 45% 30%, black, transparent 80%);
  pointer-events: none;
}
.hero__cols {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 60px;
  align-items: center;
}

/* --------------------------------------------------------------------------
   表单
   -------------------------------------------------------------------------- */

.form {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  padding: 44px 48px;
  display: grid;
  gap: 22px;
}
.field { display: grid; gap: 8px; font-size: 13px; letter-spacing: .06em; color: var(--ink-muted); }
.field input,
.field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  padding: 13px 15px;
  font-family: var(--sans);
  font-size: 16px; /* iOS 上小于 16px 会触发自动缩放 */
  outline: none;
  border-radius: 0;
  transition: border-color .18s ease;
}
.field textarea { resize: vertical; min-height: 130px; }
.field input:focus, .field textarea:focus { border-color: var(--primary); }
.field input::placeholder, .field textarea::placeholder { color: var(--ink-faintest); }
.field-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.form__note { color: var(--ink-faintest); font-size: 12.5px; text-align: center; }
.form__status { font-size: 14px; line-height: 1.7; text-align: center; }
.form__status[data-state="error"] { color: #FF9B9B; }

.form-done {
  background: var(--bg-alt);
  border: 1px solid var(--line-primary);
  padding: 56px 48px;
  text-align: center;
}

/* 联系方式卡片 */
.contact-card {
  display: block;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  padding: 26px 28px;
  color: var(--ink);
  transition: border-color .2s ease;
}
a.contact-card:hover { border-color: var(--line-primary); color: var(--ink); }
.contact-card__row {
  display: flex; justify-content: space-between; align-items: center;
  gap: 12px; margin-bottom: 6px;
  font-weight: 600; font-size: 16px;
}
.contact-card__row span.cn { color: var(--primary); font-weight: 500; }
.contact-card__meta { color: var(--ink-muted); font-size: 14px; line-height: 1.7; }

/* --------------------------------------------------------------------------
   页脚
   -------------------------------------------------------------------------- */

.footer {
  padding: 56px var(--gutter);
  border-top: 1px solid var(--line);
  background: var(--bg-footer);
}
.footer__top {
  max-width: var(--shell);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.footer__cols { display: flex; gap: 64px; flex-wrap: wrap; }
.footer__col  { display: grid; gap: 10px; font-size: 13.5px; align-content: start; }
.footer__col span { color: var(--ink-faint); font-size: 11.5px; letter-spacing: .2em; }
.footer__col a { color: var(--ink-body); }
.footer__legal {
  max-width: var(--shell);
  margin: 36px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(238, 240, 248, .06);
  color: var(--ink-faintest);
  font-size: 12px;
  letter-spacing: .04em;
}

/* --------------------------------------------------------------------------
   AI 客服浮窗
   -------------------------------------------------------------------------- */

.chat-fab {
  position: fixed;
  right: 32px; bottom: 32px;
  z-index: 80;
  width: 58px; height: 58px;
  border: none;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  color: #FFF;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 12px 36px rgba(110, 124, 255, .45);
  display: flex; align-items: center; justify-content: center;
  transition: filter .18s ease, transform .18s ease;
}
.chat-fab:hover { filter: brightness(1.14); transform: scale(1.06); }

.chat-panel {
  position: fixed;
  right: 32px; bottom: 104px;
  z-index: 80;
  width: 344px;
  max-width: calc(100vw - 40px);
  background: var(--surface-solid);
  border: 1px solid rgba(139, 157, 255, .4);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .6);
  animation: fadeUp .3s ease both;
}
.chat-panel[hidden] { display: none; }
.chat-panel__head {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(110, 124, 255, .08);
  font-weight: 600; font-size: 14px;
}
.chat-panel__head .dot { width: 8px; height: 8px; }
.chat-panel__body { padding: 20px; }
.chat-panel__msg {
  background: rgba(5, 6, 10, .6);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  font-size: 13.5px; line-height: 1.7;
  color: var(--ink-body);
  margin-bottom: 16px;
}
.chat-panel__foot {
  padding: 12px 20px;
  border-top: 1px solid var(--line);
  color: var(--ink-faintest);
  font-size: 12px; letter-spacing: .04em;
}

/* --------------------------------------------------------------------------
   动画
   -------------------------------------------------------------------------- */

@keyframes fadeUp   { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }
@keyframes pulseDot { 0%, 100% { opacity: 1; } 50% { opacity: .3; } }
@keyframes drift    { 0%, 100% { transform: none; } 50% { transform: translate(50px, -36px) scale(1.1); } }
@keyframes drift2   { 0%, 100% { transform: scale(1.05); } 50% { transform: translate(-44px, 30px) scale(.95); } }
@keyframes floatY   { 0%, 100% { transform: none; } 50% { transform: translateY(-14px); } }
@keyframes dashFlow { to { stroke-dashoffset: -28; } }
@keyframes barGrow  { from { transform: scaleY(.2); } to { transform: scaleY(1); } }
@keyframes glowPulse{ 0%, 100% { box-shadow: 0 0 40px rgba(139,157,255,.35); } 50% { box-shadow: 0 0 80px rgba(176,110,255,.5); } }

.anim-up { animation: fadeUp .8s ease both; }

/* ==========================================================================
   响应式 — 原设计稿完全没有断点，以下为新增
   ========================================================================== */

@media (max-width: 1080px) {
  :root { --gutter: 34px; --section: 88px; }

  .hero__cols { grid-template-columns: 1fr; gap: 48px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr !important; gap: 40px !important; }
  .split > .split__media { order: 2; }
}

@media (max-width: 860px) {
  :root { --gutter: 22px; --section: 72px; --nav-h: 60px; }

  /* 导航收成汉堡菜单 */
  .nav__toggle { display: flex; }
  .nav__links {
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px var(--gutter) 22px;
    background: rgba(5, 6, 10, .97);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }
  .nav__links[hidden] { display: none; }
  .nav__links a {
    padding: 14px 2px;
    border-bottom: 1px solid var(--line);
  }
  .nav__links a.is-current { border-bottom-color: var(--primary); padding-bottom: 14px; }
  .nav__links .btn { margin-top: 16px; padding: 14px 22px; font-size: 15px; }

  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 64px); padding-bottom: 72px; }

  .form, .form-done { padding: 32px 24px; }
  .field-pair { grid-template-columns: 1fr; }

  .footer__cols { gap: 40px; }

  .chat-fab   { right: 18px; bottom: 18px; width: 52px; height: 52px; font-size: 20px; }
  .chat-panel { right: 18px; bottom: 82px; }

  .quote { padding-left: 20px; }
  .card { padding: 26px 22px; }
  .slat > div, .section--alt .slat > div { padding: 20px 22px; }
  .stat { padding: 24px 22px; }
}

@media (max-width: 480px) {
  :root { --gutter: 18px; }
  .btn { width: 100%; }
  .btn-row { gap: 12px; }
  .footer__top { gap: 28px; }
  .footer__cols { gap: 28px; width: 100%; }
  .footer__col { min-width: 140px; }
}

/* 尊重系统的减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ==========================================================================
   首页专用模块
   ========================================================================== */

/* --- Hero 产品示意图 ------------------------------------------------ */

.hero__visual { position: relative; height: 560px; }

.hero__thread {
  position: absolute;
  left: 30px; top: 150px;
  width: 220px; height: 260px;
  overflow: visible;
  z-index: 1;
}

.mock-board {
  position: absolute;
  right: 0; top: 0;
  width: 420px;
  max-width: 100%;
  background: rgba(16, 19, 29, .86);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(238, 240, 248, .12);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
}
.mock-board__head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  font-weight: 600; font-size: 13.5px;
}
.mock-board__body { padding: 18px 20px; display: grid; gap: 10px; }

.mock-row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  background: rgba(238, 240, 248, .04);
  border: 1px solid rgba(238, 240, 248, .07);
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 12.5px;
  color: var(--ink-body);
}
.mock-row.is-active {
  background: rgba(139, 157, 255, .07);
  border-color: rgba(139, 157, 255, .3);
  color: var(--ink);
}
.mock-chip {
  font-size: 11px; font-style: normal;
  padding: 3px 8px; border-radius: 99px;
  white-space: nowrap;
}
.mock-chip--ok   { color: var(--green);   background: rgba(110, 231, 168, .1); }
.mock-chip--busy { color: var(--primary); background: rgba(139, 157, 255, .12); }

.mock-bars {
  display: flex; align-items: flex-end; gap: 7px;
  height: 64px; margin-top: 8px; padding: 0 4px;
}
.mock-bars i {
  flex: 1;
  border-radius: 3px 3px 0 0;
  transform-origin: bottom;
  background: linear-gradient(180deg, var(--c, #6E7CFF), transparent);
  animation: barGrow .8s var(--d, 0s) ease both;
}
.mock-days {
  display: flex; justify-content: space-between;
  padding: 0 4px;
  font-size: 10.5px; color: var(--ink-faintest);
}

.mock-phone {
  position: absolute;
  left: 0; bottom: 0;
  z-index: 2;
  width: 230px;
  background: rgba(16, 19, 29, .94);
  border: 1px solid rgba(238, 240, 248, .14);
  border-radius: 26px;
  padding: 14px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, .55);
  animation: floatY 5s ease-in-out infinite;
}
.mock-phone__notch { width: 64px; height: 5px; border-radius: 99px; background: rgba(238,240,248,.15); margin: 2px auto 12px; }
.mock-phone__label { font-size: 11px; letter-spacing: .14em; color: var(--ink-faint); margin-bottom: 8px; }
.mock-phone__title { font-weight: 600; font-size: 14px; margin-bottom: 12px; }
.mock-phone__lines { display: grid; gap: 7px; margin-bottom: 12px; }
.mock-phone__lines > div { display: flex; justify-content: space-between; gap: 10px; font-size: 12px; color: var(--ink-body); }
.mock-phone__lines span:last-child { color: var(--ink); }
.mock-phone__cta {
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
  color: #FFF; text-align: center;
  border-radius: 9px; padding: 10px;
  font-weight: 600; font-size: 12.5px;
}
.mock-phone__sync { text-align: center; font-size: 10.5px; color: var(--teal); margin-top: 8px; }

/* --- 对接品牌条 ---------------------------------------------------- */

.works-with {
  display: flex; align-items: center; gap: 30px; flex-wrap: wrap;
  margin-top: 80px; padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--ink-body); font-size: 14px; letter-spacing: .06em;
}
.works-with__label { font-size: 11.5px; letter-spacing: .2em; color: var(--ink-faintest); }

/* --- 三端一体 ------------------------------------------------------ */

.connect {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  max-width: 1000px;
  margin: 0 auto;
}
.connect__node {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  text-align: center;
  transition: border-color .2s ease;
}
.connect__node:hover { border-color: var(--line-primary); }
.connect__node--hub {
  background: rgba(110, 124, 255, .1);
  border-color: var(--line-primary);
  padding: 34px 26px;
  animation: glowPulse 4s ease-in-out infinite;
}
.connect__icon  { font-size: 28px; margin-bottom: 12px; }
.connect__title { font-weight: 600; font-size: 16px; margin-bottom: 4px; }
.connect__text  { color: var(--ink-muted); font-size: 13px; line-height: 1.6; }
.connect__node--hub .connect__text { color: var(--ink-body); }
.connect__arrow { justify-self: center; }

/* --- 区块标题行 ---------------------------------------------------- */

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.section-head a { font-size: 14px; letter-spacing: .06em; white-space: nowrap; }

/* --- 案例卡片 ------------------------------------------------------ */

.case-card { padding: 38px 36px; border-radius: 18px; }
a.case-card:hover { border-color: rgba(139, 157, 255, .6); box-shadow: 0 26px 70px rgba(110, 124, 255, .18); }
a.case-card--violet:hover { border-color: rgba(176, 110, 255, .6); box-shadow: 0 26px 70px rgba(176, 110, 255, .18); }

.case-card__head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px; flex-wrap: wrap;
  margin-bottom: 24px;
}
.case-card__kicker { font-size: 11.5px; letter-spacing: .22em; color: var(--ink-faint); text-transform: uppercase; }
.case-card__more   { color: var(--primary); font-size: 14px; letter-spacing: .06em; }

.case-mock {
  background: rgba(5, 6, 10, .6);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  display: grid; gap: 8px;
  margin-bottom: 22px;
}
.case-mock__row {
  display: flex; justify-content: space-between; gap: 12px;
  font-size: 12px; color: var(--ink-body);
}
.case-mock__row--faint { font-size: 11.5px; color: var(--ink-faint); }
.case-mock__bar { height: 7px; border-radius: 99px; background: rgba(238,240,248,.08); overflow: hidden; }
.case-mock__bar i { display: block; height: 100%; border-radius: 99px; }
.case-mock__split { display: flex; gap: 6px; }
.case-mock__split em {
  flex: 1; text-align: center; font-style: normal;
  font-size: 10.5px; border: 1px solid; border-radius: 6px; padding: 4px 0;
}

/* --- 编号列表 ------------------------------------------------------ */

.numbered { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.numbered li {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px 28px;
  display: flex; gap: 20px; align-items: baseline;
}
.numbered__n     { color: var(--primary); font-weight: 700; font-size: 15px; min-width: 24px; }
.numbered__title { font-weight: 600; font-size: 16px; margin-bottom: 4px; }
.numbered__title .cn { color: var(--primary); font-weight: 500; }
.numbered__text  { color: var(--ink-muted); font-size: 14px; line-height: 1.65; }

/* --- 合作流程 ------------------------------------------------------ */

.steps { list-style: none; margin: 0; padding: 0; }
.step {
  background: rgba(16, 19, 29, .6);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 26px 24px;
}
.step--first {
  background: linear-gradient(180deg, rgba(110,124,255,.12), rgba(16,19,29,.6));
  border-color: var(--line-primary);
}
.step__n     { color: var(--primary); font-weight: 700; font-size: 22px; margin-bottom: 14px; }
.step__title { font-weight: 600; font-size: 16px; margin-bottom: 3px; }
.step__cn    { color: var(--primary); font-size: 13px; margin-bottom: 11px; }
.step__text  { color: var(--ink-muted); font-size: 13.5px; line-height: 1.65; }

/* --- CTA ------------------------------------------------------------ */

.cta { padding-block: 130px; overflow: hidden; }

/* ==========================================================================
   首页模块的响应式
   ========================================================================== */

@media (max-width: 1080px) {
  /* Hero 示意图改为正常流布局 */
  .hero__visual { height: auto; display: grid; gap: 18px; justify-items: start; }
  .hero__thread { display: none; }
  .mock-board   { position: static; width: 100%; max-width: 460px; }
  .mock-phone   { position: static; width: 240px; animation: none; }

  .connect { grid-template-columns: 1fr auto 1fr; }
  .connect__node--hub { grid-column: 1 / -1; order: -1; }
  .connect__arrow { transform: rotate(90deg); }
}

@media (max-width: 860px) {
  .connect { grid-template-columns: 1fr; justify-items: stretch; }
  .connect__node--hub { order: 0; }
  .connect__arrow { transform: rotate(90deg); margin-block: 4px; }

  .works-with { margin-top: 52px; gap: 18px; font-size: 13px; }
  .section-head { margin-bottom: 40px; }
  .case-card { padding: 28px 22px; }
  .numbered li { padding: 20px 22px; gap: 14px; }
  .cta { padding-block: 90px; }
}

@media (max-width: 480px) {
  .hero__visual { justify-items: stretch; }
  .mock-phone { width: 100%; max-width: 260px; justify-self: center; }
  .numbered li { flex-direction: column; gap: 6px; }
  .section-head a { white-space: normal; }
}

/* ==========================================================================
   服务页 / 案例页
   ========================================================================== */

.split {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 70px;
  align-items: start;
}
/* 桌面端把图表列放到左边；移动端由上面的断点统一还原为「文字在前」 */
.split--media-first { grid-template-columns: 1.15fr 1fr; }
.split--media-first .split__body  { order: 2; }
.split--media-first .split__media { order: 1; }

.svc-num {
  font-family: var(--display);
  font-style: italic;
  color: var(--primary);
  font-size: 24px;
  margin-bottom: 16px;
}
.svc-title { font-weight: 700; font-size: clamp(26px, 3vw, 42px); line-height: 1.15; letter-spacing: -.01em; margin-bottom: 8px; }
.svc-cn    { font-family: var(--serif); color: var(--primary); font-size: 17px; margin-bottom: 20px; }

.case-head {
  display: flex; justify-content: space-between; align-items: center;
  gap: 14px; flex-wrap: wrap; margin-bottom: 34px;
}
.case-head__kicker { font-size: 12px; letter-spacing: .24em; color: var(--ink-faint); text-transform: uppercase; }
.case-sub { font-family: var(--serif); color: var(--primary); font-size: 18px; margin-bottom: 52px; }

.case-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; margin-bottom: 56px; }
.case-cols h3 { color: var(--primary); font-size: 12px; letter-spacing: .24em; margin-bottom: 16px; text-transform: uppercase; }
.case-cols p  { color: var(--ink-body); font-size: 15.5px; line-height: 1.85; text-wrap: pretty; }

.stat-row {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--line); border: 1px solid var(--line);
  margin-bottom: 56px;
}

@media (max-width: 860px) {
  .case-cols { grid-template-columns: 1fr; gap: 32px; margin-bottom: 40px; }
  .stat-row  { grid-template-columns: 1fr; margin-bottom: 40px; }
  .case-sub  { margin-bottom: 34px; }
  .case-head { margin-bottom: 24px; }
}

/* ==========================================================================
   联系页
   ========================================================================== */

.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 64px;
  align-items: start;
}

@media (max-width: 1080px) {
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

/* ==========================================================================
   常见问题
   ========================================================================== */

.faq { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px 44px; }
.faq__item {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}
.faq__q {
  font-weight: 600;
  font-size: 17px;
  line-height: 1.45;
  margin-bottom: 4px;
}
.faq__q .cn { color: var(--primary); font-weight: 500; display: block; font-size: 14.5px; margin-top: 3px; }
.faq__a { color: var(--ink-muted); font-size: 14.5px; line-height: 1.75; text-wrap: pretty; }
.faq__a + .faq__a { margin-top: 8px; }

@media (max-width: 860px) {
  .faq { grid-template-columns: 1fr; gap: 18px; }
}

/* ==========================================================================
   点餐系统页
   ========================================================================== */

/* --- 模块大卡 ------------------------------------------------------ */

.module {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 40px 38px;
  position: relative;
  overflow: hidden;
}
.module--feature { border-color: var(--line-primary); background: linear-gradient(170deg, rgba(110,124,255,.1), rgba(16,19,29,.78) 60%); }
.module__tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 11.5px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--primary); margin-bottom: 18px;
}
.module__title { font-weight: 700; font-size: clamp(24px, 2.8vw, 34px); line-height: 1.18; letter-spacing: -.01em; margin-bottom: 6px; }
.module__cn    { font-family: var(--serif); color: var(--primary); font-size: 16px; margin-bottom: 20px; }
.module__lede  { color: var(--ink-body); font-size: 15.5px; line-height: 1.8; margin-bottom: 28px; text-wrap: pretty; }

.benefits { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.benefits li { display: flex; gap: 14px; align-items: flex-start; }
.benefits .tick {
  flex-shrink: 0; width: 22px; height: 22px; margin-top: 2px;
  border-radius: 50%;
  background: rgba(110, 231, 168, .12);
  border: 1px solid rgba(110, 231, 168, .4);
  color: var(--green);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px;
}
.benefits b { display: block; font-weight: 600; font-size: 15px; margin-bottom: 3px; }
.benefits b .cn { color: var(--primary); font-weight: 500; }
.benefits p { color: var(--ink-muted); font-size: 14px; line-height: 1.7; }

/* --- 对比表 -------------------------------------------------------- */

.vs-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.vs {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 14.5px;
}
.vs th, .vs td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.vs thead th { font-size: 12px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); font-weight: 500; }
.vs thead th:last-child { color: var(--primary); }
.vs tbody th { font-weight: 500; color: var(--ink-body); width: 26%; }
.vs td:nth-child(2) { color: var(--ink-muted); }
.vs td:last-child { color: var(--ink); background: rgba(110, 124, 255, .06); }
.vs tbody tr:last-child th, .vs tbody tr:last-child td { border-bottom: none; }

/* --- 成本试算器 ---------------------------------------------------- */

.calc {
  background: var(--bg-alt);
  border: 1px solid var(--line-primary);
  border-radius: 18px;
  padding: 38px 36px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.calc__controls { display: grid; gap: 22px; }
.calc__field label { display: block; font-size: 13px; letter-spacing: .05em; color: var(--ink-muted); margin-bottom: 10px; }
.calc__field output { color: var(--primary); font-weight: 600; }
.calc__field input[type="range"] { width: 100%; accent-color: var(--primary); height: 22px; }
.calc__note { color: var(--ink-faintest); font-size: 12px; line-height: 1.7; }

.calc__out { display: grid; gap: 14px; align-content: start; }
.calc__row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 14px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(5, 6, 10, .5);
}
.calc__row span { color: var(--ink-muted); font-size: 13.5px; }
.calc__row b { font-size: 19px; font-weight: 600; white-space: nowrap; }
.calc__row--bad  b { color: #FF9B9B; }
.calc__row--good b { color: var(--green); }
.calc__row--net {
  border-color: var(--line-primary);
  background: linear-gradient(120deg, rgba(110,124,255,.14), rgba(176,110,255,.1));
}
.calc__row--net span { color: var(--ink); font-weight: 500; }
.calc__row--net b { font-size: 26px; color: var(--ink); }

/* --- 服务区域 ------------------------------------------------------ */

.areas { display: flex; flex-wrap: wrap; gap: 10px; }
.area-chip {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 18px;
  font-size: 14px;
  color: var(--ink-body);
  background: rgba(16, 19, 29, .5);
}
.area-chip--primary {
  border-color: var(--line-primary);
  background: rgba(110, 124, 255, .1);
  color: var(--ink);
  font-weight: 500;
}

/* --- 流程步骤（横向） ---------------------------------------------- */

.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.flow__step { background: var(--bg-alt); padding: 26px 24px; }
.flow__n { color: var(--primary); font-weight: 700; font-size: 13px; letter-spacing: .1em; margin-bottom: 12px; }
.flow__t { font-weight: 600; font-size: 15.5px; margin-bottom: 5px; }
.flow__d { color: var(--ink-muted); font-size: 13.5px; line-height: 1.65; }

@media (max-width: 1080px) {
  .calc { grid-template-columns: 1fr; gap: 28px; }
  .flow { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .module { padding: 30px 24px; }
  .calc { padding: 26px 22px; }
  .flow { grid-template-columns: 1fr; }
  .calc__row b { font-size: 17px; }
  .calc__row--net b { font-size: 22px; }
}