/* Pipi 官网样式。设计基底：产品原型项目的 src/themes/intercom/DESIGN.md，颜色角色沿用产品后台（产品原型项目的 src/resources/规范/UI交互规范.md）：
   冷调亮色底、炭黑主按钮；品牌红只做点缀；AI 紫只用于标识 AI。 */

@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('fonts/InterVariable.woff2') format('woff2');
}

:root {
  --ink: #0c111d;
  --text: #101828;
  --text-2: #475467;
  --text-3: #667085;
  --text-4: #98a2b3;
  --line: #eaecf0;
  --line-2: #f2f4f7;
  --line-strong: #d0d5dd;
  --bg: #ffffff;
  --bg-tint: #f8f9fb;
  --bg-muted: #f2f4f7;
  --brand: #ce1126;
  --brand-soft: #fdecee;
  --ai: #7a5af8;
  --ai-soft: #f4f3ff;
  --ai-border: #d9d6fe;
  --ai-text: #5925dc;
  --ok: #067647;
  --ok-soft: #ecfdf3;
  --warn: #b54708;
  --warn-soft: #fffaeb;
  --info: #175cd3;
  --info-soft: #eff8ff;
  --dark: #0c111d;
  --dark-text: #98a2b3;
  --dark-line: rgba(255, 255, 255, 0.1);
  --shadow-window: 0 0 0 1px rgba(16, 24, 40, 0.06), 0 2px 4px rgba(16, 24, 40, 0.04), 0 24px 48px -12px rgba(16, 24, 40, 0.12),
    0 64px 120px -24px rgba(16, 24, 40, 0.2);
  --shadow-float: 0 1px 2px rgba(16, 24, 40, 0.06), 0 16px 32px -8px rgba(16, 24, 40, 0.18);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --header-h: 68px;
  --font: 'Inter', 'PingFang SC', 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

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

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv11', 'ss03';
}

h1,
h2,
h3,
h4 {
  color: var(--ink);
  font-weight: 600;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 3px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--text);
  color: #fff;
  font-size: 14px;
  text-decoration: none;
  transition: top 0.15s;
}

.skip:focus {
  top: 12px;
}

.container {
  width: 100%;
  max-width: 1264px;
  margin: 0 auto;
  padding: 0 32px;
}

.icon {
  flex: none;
}

/* 占位信息：上线前替换 src/config.mjs */
.ph {
  background: #fef7c3;
  box-shadow: 0 0 0 2px #fef7c3;
  border-radius: 3px;
  border-bottom: 1px dashed #ca8504;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: 8px;
  font: inherit;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s, box-shadow 0.15s;
}

.btn--sm {
  height: 36px;
  padding: 0 14px;
  font-size: 14px;
}

.btn--lg {
  height: 48px;
  padding: 0 22px;
  font-size: 16px;
}

.btn--block {
  width: 100%;
}

.btn--primary {
  background: var(--text);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12), 0 1px 2px rgba(16, 24, 40, 0.16);
}

.btn--primary:hover {
  background: #1d2939;
}

.btn--primary .icon {
  transition: transform 0.2s var(--ease);
}

.btn--primary:hover .icon {
  transform: translateX(3px);
}

.btn--secondary {
  background: #fff;
  color: var(--text);
  border-color: var(--line-strong);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
}

.btn--secondary:hover {
  background: var(--bg-tint);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
}

.btn--ghost:hover {
  background: var(--bg-muted);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex: none;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--text-2);
  cursor: pointer;
  transition: background-color 0.15s, color 0.15s;
}

.copy-btn:hover {
  background: var(--bg-tint);
  color: var(--ink);
}

.copy-btn__done {
  display: none;
}

.copy-btn.is-done .copy-btn__idle {
  display: none;
}

.copy-btn.is-done .copy-btn__done {
  display: inline-flex;
  color: var(--ok);
}

html:not(.js) .copy-btn {
  display: none;
}

/* ---------- 标签与小部件（产品示意图共用） ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex: none;
  height: 20px;
  padding: 0 7px;
  border-radius: 999px;
  background: var(--bg-muted);
  color: var(--text-2);
  font-size: 11.5px;
  font-weight: 500;
  line-height: 1;
  white-space: nowrap;
}

.tag--lg {
  height: 24px;
  padding: 0 10px;
  font-size: 12px;
}

.tag--ai {
  background: var(--ai-soft);
  color: var(--ai-text);
}

.tag--warn {
  background: var(--warn-soft);
  color: var(--warn);
}

.tag--ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.tag--lead {
  background: var(--info-soft);
  color: var(--info);
}

.sparkle {
  flex: none;
  color: var(--ai);
}

.tag--ai .sparkle {
  color: currentColor;
}

.av {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: var(--s);
  height: var(--s);
  border-radius: 50%;
  background: var(--av);
  color: #344054;
  font-size: calc(var(--s) * 0.34);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.av__ch {
  position: absolute;
  right: -3px;
  bottom: -3px;
  padding: 1.5px;
  border-radius: 50%;
  background: #fff;
}

.av__ch .ch {
  border-radius: 50%;
}

.seg {
  display: inline-flex;
  padding: 2px;
  border-radius: 8px;
  background: var(--bg-muted);
}

.seg span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 6px;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.seg span.is-on {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}

.seg b {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16px;
  height: 16px;
  padding: 0 4px;
  border-radius: 999px;
  background: var(--warn-soft);
  color: var(--warn);
  font-size: 10.5px;
}

.mini-btn {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  font-size: 12.5px;
  font-weight: 500;
  white-space: nowrap;
}

.mini-btn--dark {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--text-2);
  font-size: 12.5px;
  font-weight: 500;
}

/* 消息气泡 */
.msg {
  max-width: 80%;
  padding: 9px 13px;
  border-radius: 14px;
}

.msg p {
  margin: 0;
  font-size: 14px;
  line-height: 1.5;
  color: var(--text);
}

.msg time {
  display: block;
  margin-top: 2px;
  color: var(--text-4);
  font-size: 11px;
  text-align: right;
}

.msg--in {
  align-self: flex-start;
  border: 1px solid var(--line);
  border-bottom-left-radius: 4px;
  background: #fff;
}

.msg--ai {
  align-self: flex-end;
  border: 1px solid var(--ai-border);
  border-bottom-right-radius: 4px;
  background: var(--ai-soft);
}

.msg--out {
  align-self: flex-end;
  border-bottom-right-radius: 4px;
  background: var(--text);
}

.msg--out p {
  color: #fff;
}

.msg__by {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 4px;
  color: var(--ai-text);
  font-size: 11.5px;
  font-weight: 600;
}

.msg--out .msg__by {
  color: rgba(255, 255, 255, 0.65);
}

.msg--sm {
  max-width: 92%;
  padding: 9px 12px;
}

.msg--sm p {
  font-size: 13px;
}

/* ---------- 页头导航 ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  transition: background-color 0.2s, box-shadow 0.2s;
}

.header.is-scrolled,
.menu-open .header {
  background: rgba(255, 255, 255, 0.84);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  box-shadow: 0 1px 0 var(--line);
}

/* backdrop-filter 会让页头成为 fixed 子元素的定位容器，移动端菜单展开时去掉，菜单才能铺满屏幕 */
.menu-open .header {
  background: #fff;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.header__inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  color: var(--ink);
  border-radius: 6px;
}

.logo__dot {
  fill: var(--brand);
}

.nav {
  display: flex;
  gap: 2px;
}

.nav a {
  position: relative;
  padding: 8px 12px;
  border-radius: 8px;
  color: var(--text-2);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}

.nav a::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 1.5px;
  border-radius: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s var(--ease);
}

.nav a:hover,
.nav a[aria-current] {
  color: var(--ink);
}

.nav a:hover::after,
.nav a[aria-current]::after {
  transform: scaleX(1);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}

.lang {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
}

.lang a {
  padding: 3px 10px;
  border-radius: 999px;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-decoration: none;
  transition: color 0.15s, background-color 0.15s;
}

.lang a:hover {
  color: var(--ink);
}

.lang a[aria-current] {
  background: var(--text);
  color: #fff;
}

.lang--lg a {
  padding: 6px 16px;
  font-size: 13px;
}

.menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-right: -8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.menu-btn__close {
  display: none;
}

.menu-open .menu-btn__open {
  display: none;
}

.menu-open .menu-btn__close {
  display: inline-flex;
}

.mobile-menu {
  display: none;
}

/* ---------- 通用区块 ---------- */

.section {
  position: relative;
  padding: 128px 0;
}

.section--tint {
  background: var(--bg-tint);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 20px;
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.005em;
}

.eyebrow__dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-soft);
}

.eyebrow--pill {
  padding: 6px 14px 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.section-head {
  max-width: 780px;
  margin-bottom: 64px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.section-head__lead {
  max-width: 600px;
  margin: 20px 0 0;
  color: var(--text-2);
  font-size: 18px;
  line-height: 1.6;
}

.section-head__lead a,
.qa-item__a a,
.prose a,
.company a,
.footer__legal a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: text-decoration-color 0.15s;
}

.section-head__lead a:hover,
.qa-item__a a:hover,
.prose a:hover,
.company a:hover,
.footer__legal a:hover {
  text-decoration-color: currentColor;
}

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  padding: 72px 0 112px;
  overflow: hidden;
  overflow-x: clip;
  overflow-y: visible;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line-2) 1px, transparent 1px), linear-gradient(90deg, var(--line-2) 1px, transparent 1px);
  background-size: 56px 56px;
  background-position: center top;
  -webkit-mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 55% at 50% 0%, #000 20%, transparent 75%);
  pointer-events: none;
}

.hero .container {
  position: relative;
}

.hero__top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 64px;
  align-items: end;
  padding-bottom: 72px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 6.6vw, 86px);
  line-height: 0.98;
  letter-spacing: -0.048em;
}

.hero__lead {
  margin: 0 0 28px;
  color: var(--text-2);
  font-size: 19px;
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero__note {
  margin: 20px 0 0;
  color: var(--text-3);
  font-size: 13.5px;
}

/* 产品界面合成图 */
.demo {
  position: relative;
  margin: 0;
}

.demo::before {
  content: '';
  position: absolute;
  inset: 8% 6% -8%;
  z-index: -1;
  background: radial-gradient(45% 55% at 28% 45%, rgba(122, 90, 248, 0.2), transparent 70%),
    radial-gradient(38% 50% at 78% 60%, rgba(206, 17, 38, 0.1), transparent 70%);
  filter: blur(48px);
  pointer-events: none;
}

.app {
  display: grid;
  grid-template-columns: 60px 300px minmax(0, 1fr) 264px;
  grid-template-rows: minmax(0, 1fr);
  height: 700px;
  overflow: hidden;
  border-radius: 16px;
  background: #fff;
  box-shadow: var(--shadow-window);
  text-align: left;
}

.app__rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 16px 0;
  border-right: 1px solid var(--line);
  background: var(--bg-tint);
}

.rail__logo {
  position: relative;
  width: 28px;
  height: 28px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: var(--text);
}

.rail__logo i {
  position: absolute;
  top: 7px;
  right: 7px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
}

.rail__item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  color: var(--text-3);
}

.rail__item.is-active {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08), 0 0 0 1px var(--line);
}

.app__list {
  min-width: 0;
  border-right: 1px solid var(--line);
}

.list__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 16px 16px 14px;
  border-bottom: 1px solid var(--line);
}

.list__head strong {
  font-size: 15px;
  color: var(--ink);
}

.list__items {
  margin: 0;
  padding: 0;
  list-style: none;
}

.conv {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line-2);
}

.conv.is-active {
  background: var(--bg-tint);
}

.conv.is-active::before {
  content: '';
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 0;
  width: 2px;
  border-radius: 0 2px 2px 0;
  background: var(--brand);
}

.conv__body {
  flex: 1;
  min-width: 0;
}

.conv__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.conv__row + .conv__row {
  margin-top: 4px;
}

.conv__row strong {
  font-size: 13.5px;
  color: var(--ink);
}

.conv__row time {
  color: var(--text-4);
  font-size: 11.5px;
}

.conv__text {
  overflow: hidden;
  color: var(--text-3);
  font-size: 12.5px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.app__chat {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: #fcfcfd;
}

.chat__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 20px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.chat__who {
  display: flex;
  flex-direction: column;
  min-width: 0;
  margin-right: auto;
}

.chat__who strong {
  font-size: 14.5px;
}

.chat__who span {
  color: var(--text-3);
  font-size: 12.5px;
}

.chat__msgs {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: flex-end;
  gap: 10px;
  min-height: 0;
  padding: 18px 24px;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 28px);
  mask-image: linear-gradient(to bottom, transparent 0, #000 28px);
}

.day {
  align-self: center;
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--text-4);
  font-size: 11.5px;
}

.typing {
  display: none;
  align-self: flex-end;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--ai-border);
  border-radius: 14px;
  border-bottom-right-radius: 4px;
  background: var(--ai-soft);
}

.typing.is-shown {
  display: inline-flex;
}

.typing span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ai);
  opacity: 0.35;
  animation: typing 1s infinite var(--ease);
}

.typing span:nth-child(2) {
  animation-delay: 0.15s;
}

.typing span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes typing {
  0%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

.poster {
  position: relative;
  width: 248px;
  height: 108px;
  margin: 2px 0 8px;
  overflow: hidden;
  border-radius: 10px;
  background: radial-gradient(120% 90% at 90% 0%, #3b2a86 0%, transparent 60%), linear-gradient(135deg, #0c111d, #1d2939);
  color: #fff;
}

.poster__brand {
  position: absolute;
  top: 14px;
  left: 14px;
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.2em;
  opacity: 0.75;
}

.poster__deal {
  position: absolute;
  top: 32px;
  left: 14px;
  font-size: 19px;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.poster__car {
  position: absolute;
  right: -10px;
  bottom: 6px;
  width: 196px;
}

.poster__bar {
  position: absolute;
  left: 14px;
  bottom: 14px;
  width: 28px;
  height: 3px;
  border-radius: 2px;
  background: var(--brand);
}

.chat__composer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--ai-text);
  font-size: 13.5px;
}

.chat__composer > span:first-of-type {
  margin-right: auto;
}

.app__side {
  min-width: 0;
  padding: 24px 20px;
  border-left: 1px solid var(--line);
}

.side__profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  text-align: center;
}

.side__profile .av {
  margin-bottom: 10px;
}

.side__profile strong {
  font-size: 14.5px;
}

.side__profile span {
  color: var(--text-3);
  font-size: 12.5px;
}

.side__group {
  padding: 18px 0 8px;
  border-bottom: 1px solid var(--line-2);
}

.side__group:last-child {
  border-bottom: 0;
}

.side__group h4 {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0 0 10px;
  color: var(--text-2);
  font-size: 12px;
  font-weight: 600;
}

.field {
  display: grid;
  gap: 2px;
  margin-bottom: 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--bg-tint);
}

.field__label {
  color: var(--text-3);
  font-size: 11.5px;
}

.field__value {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.field--inline {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
}

.field.is-flash {
  animation: flash 1.8s var(--ease);
}

@keyframes flash {
  0%,
  40% {
    background: var(--ai-soft);
    box-shadow: 0 0 0 1px var(--ai-border);
  }
  100% {
    background: var(--bg-tint);
    box-shadow: 0 0 0 1px transparent;
  }
}

.float {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px 9px 9px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-float);
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
}

.float__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: var(--ai-soft);
  color: var(--ai);
}

.float__icon--ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.float--replied {
  left: -24px;
  bottom: 132px;
}

.float--lead {
  right: -24px;
  bottom: 148px;
}

/* 首屏演示：有 JS 且未开启减少动态效果时逐条播放（<head> 内联脚本给 html 加 demo-armed），否则直接显示最终画面 */
.demo-armed .demo .msg[data-step]:not(.is-shown) {
  display: none;
}

.demo-armed .demo .msg.is-shown {
  animation: msg-in 0.45s var(--ease) both;
}

.demo-armed .demo .field[data-step],
.demo-armed .demo .float[data-step] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.demo-armed .demo .field[data-step].is-shown,
.demo-armed .demo .float[data-step].is-shown {
  opacity: 1;
  transform: none;
}

@keyframes msg-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 支持平台 ---------- */

.platforms {
  padding: 0 0 112px;
  text-align: center;
}

.platforms__title {
  margin: 0 0 32px;
  color: var(--text-3);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0;
}

.platforms__list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px 64px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.platforms__list li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.platforms__list .ch {
  border-radius: 8px;
}

.platforms__note {
  margin: 28px 0 0;
  color: var(--text-4);
  font-size: 13.5px;
}

/* ---------- 核心能力 ---------- */

.bento {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.25s var(--ease);
}

.card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 16px 40px -20px rgba(16, 24, 40, 0.2);
}

.card__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 272px;
  padding: 24px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-2);
  background: linear-gradient(180deg, var(--bg-tint), #fff);
}

.card__text {
  padding: 24px 28px 30px;
}

.card h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.35;
  letter-spacing: -0.015em;
}

.card__text p {
  margin: 0;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.6;
}

.card--wide {
  grid-column: span 2;
  flex-direction: row;
}

.card--wide .card__visual {
  order: 2;
  flex: 1.3;
  height: auto;
  min-height: 320px;
  border-bottom: 0;
  border-left: 1px solid var(--line-2);
}

.card--wide .card__text {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: flex-end;
  padding: 36px;
}

.card--wide h3 {
  font-size: 24px;
  letter-spacing: -0.02em;
}

.card--extras {
  padding: 32px 28px;
}

.card--extras h3 {
  margin-bottom: 24px;
}

.extras {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.extras li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-2);
  font-size: 15px;
}

.extras__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-tint);
  color: var(--ink);
}

/* 能力卡片里的小示意图 */
.fv {
  width: 100%;
  max-width: 360px;
}

.fv--inbox {
  display: grid;
  gap: 8px;
  max-width: 400px;
}

.fv-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.04);
}

.fv-row:nth-child(2) {
  position: relative;
  z-index: 1;
  margin: 0 -14px 0 14px;
  box-shadow: var(--shadow-float);
}

.fv-row__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
}

.fv-row__body strong {
  font-size: 13.5px;
}

.fv-row__body span {
  overflow: hidden;
  color: var(--text-3);
  font-size: 12.5px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.fv--chat {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.map {
  position: relative;
  height: 76px;
  margin-top: 10px;
  overflow: hidden;
  border: 1px solid var(--ai-border);
  border-radius: 10px;
  background: #edf1f5;
}

.map__grid {
  position: absolute;
  inset: 0;
  background: linear-gradient(118deg, transparent 47%, #fff 47%, #fff 53%, transparent 53%),
    linear-gradient(22deg, transparent 46%, #fff 46%, #fff 51%, transparent 51%),
    repeating-linear-gradient(0deg, #e2e7ee 0 1px, transparent 1px 16px), repeating-linear-gradient(90deg, #e2e7ee 0 1px, transparent 1px 16px);
}

.map__pin {
  position: absolute;
  top: 40%;
  left: 56%;
  color: #fff;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 2px 3px rgba(16, 24, 40, 0.3));
}

.map__pin .icon {
  width: 26px;
  height: 26px;
  fill: var(--brand);
  stroke: #fff;
  stroke-width: 1.5;
}

.map__label {
  position: absolute;
  left: 8px;
  bottom: 8px;
  padding: 2px 8px;
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-size: 11px;
  font-weight: 600;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.08);
}

.fv--kb {
  display: grid;
  gap: 8px;
}

.file {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
}

.file > .icon {
  color: var(--text-3);
}

.file > span:first-of-type {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.qa {
  display: grid;
  gap: 4px;
  padding: 12px;
  border: 1px dashed var(--line-strong);
  border-radius: 10px;
  background: #fff;
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.5;
}

.qa strong {
  color: var(--ink);
  font-weight: 600;
}

.lead-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: var(--shadow-float);
}

.lead-card__head {
  display: flex;
  align-items: center;
  gap: 12px;
}

.lead-card__head > div {
  display: flex;
  flex: 1;
  flex-direction: column;
  min-width: 0;
}

.lead-card__head strong {
  font-size: 14px;
}

.lead-card__head span {
  color: var(--text-3);
  font-size: 12.5px;
}

.lead-card__row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--bg-tint);
  color: var(--ink);
  font-size: 13.5px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.lead-card__row .icon {
  color: var(--text-3);
}

.lead-card__src {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  color: var(--ai-text);
  font-size: 12px;
  font-weight: 500;
}

.fv--takeover {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.seg--lg span {
  padding: 6px 14px;
  font-size: 13px;
}

.seg--lg span.is-on {
  background: var(--text);
  color: #fff;
}

.fv--takeover .msg {
  align-self: stretch;
  max-width: none;
  margin-left: 40px;
}

.fv--reports {
  max-width: 420px;
}

.kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.kpi {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.kpi span {
  color: var(--text-3);
  font-size: 11.5px;
}

.kpi strong {
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.chart {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 120px;
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.bar {
  display: flex;
  flex: 1;
  flex-direction: column-reverse;
  height: 100%;
}

.bar i {
  display: block;
}

.bar__you {
  border-radius: 0 0 3px 3px;
  background: #d0d5dd;
}

.bar__ai {
  border-radius: 3px 3px 0 0;
  background: var(--ai);
  opacity: 0.85;
}

.fv__note {
  margin: 8px 0 0;
  color: var(--text-4);
  font-size: 11px;
  text-align: right;
}

/* ---------- 三步上手 ---------- */

.steps-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step {
  position: relative;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.step::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--brand);
}

.step__num {
  display: block;
  margin-bottom: 24px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
}

.step__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 176px;
  margin-bottom: 28px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--bg-tint), #fff);
}

.step h3 {
  margin: 0 0 10px;
  font-size: 22px;
  letter-spacing: -0.02em;
}

.step > p {
  margin: 0;
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.65;
}

.sv--connect {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.sv__ch {
  position: relative;
}

.sv__ch .ch {
  border-radius: 8px;
}

.sv__ok {
  position: absolute;
  right: -5px;
  bottom: -5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--ok);
  color: #fff;
}

.sv__ok .icon {
  stroke-width: 3;
}

.sv__caption {
  flex-basis: 100%;
  color: var(--ok);
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
}

.sv--test {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 280px;
}

.sv__label {
  color: var(--text-3);
  font-size: 12px;
  font-weight: 500;
}

.sv--test .msg {
  align-self: stretch;
  max-width: none;
}

.sv--live {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
}

.sv--live > div {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sv--live strong {
  color: var(--ink);
  font-size: 14px;
}

.switch {
  position: relative;
  width: 40px;
  height: 24px;
  flex: none;
  border-radius: 999px;
  background: var(--text);
}

.switch i {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(16, 24, 40, 0.2);
}

.live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ok);
  font-size: 12.5px;
  font-weight: 600;
}

.live i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #12b76a;
  box-shadow: 0 0 0 0 rgba(18, 183, 106, 0.5);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(18, 183, 106, 0.45);
  }
  70% {
    box-shadow: 0 0 0 7px rgba(18, 183, 106, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(18, 183, 106, 0);
  }
}

/* ---------- 合规与数据（深色段） ---------- */

.section--dark {
  overflow: hidden;
  background: var(--dark);
  color: #fff;
}

.section--dark .container {
  position: relative;
}

.trust__glow {
  position: absolute;
  top: -340px;
  left: 50%;
  width: 1200px;
  height: 720px;
  background: radial-gradient(closest-side at 40% 50%, rgba(122, 90, 248, 0.24), transparent),
    radial-gradient(closest-side at 65% 55%, rgba(206, 17, 38, 0.14), transparent);
  transform: translateX(-50%);
  pointer-events: none;
}

.section--dark .section-head h2 {
  color: #fff;
}

.section--dark .section-head__lead {
  color: var(--dark-text);
}

.section--dark .eyebrow {
  color: #d0d5dd;
}

.section--dark .eyebrow__dot {
  box-shadow: 0 0 0 3px rgba(206, 17, 38, 0.3);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--dark-line);
  border-left: 1px solid var(--dark-line);
  list-style: none;
}

.trust-item {
  padding: 36px 32px;
  border-right: 1px solid var(--dark-line);
  border-bottom: 1px solid var(--dark-line);
}

.trust-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  margin-bottom: 22px;
  border: 1px solid var(--dark-line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.trust-item h3 {
  margin: 0 0 8px;
  color: #fff;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.trust-item p {
  margin: 0;
  color: var(--dark-text);
  font-size: 15px;
  line-height: 1.6;
}

.trust__links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  margin-top: 44px;
}

.trust__links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-weight: 500;
  text-decoration: none;
  transition: border-color 0.15s;
}

.trust__links a:hover {
  border-color: #fff;
}

.trust__links .icon {
  transition: transform 0.2s var(--ease);
}

.trust__links a:hover .icon {
  transform: translateX(3px);
}

/* ---------- FAQ ---------- */

.faq {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr);
  gap: 72px;
  align-items: start;
}

.section-head--side {
  position: sticky;
  top: calc(var(--header-h) + 40px);
  margin-bottom: 0;
}

.faq__list {
  border-top: 1px solid var(--line);
}

.qa-item {
  border-bottom: 1px solid var(--line);
}

.qa-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0;
  color: var(--ink);
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
  list-style: none;
  cursor: pointer;
}

.qa-item summary::-webkit-details-marker {
  display: none;
}

.qa-item summary:hover .qa-item__icon {
  border-color: var(--line-strong);
}

.qa-item__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: 50%;
  color: var(--text-2);
  transition: transform 0.25s var(--ease), background-color 0.2s, color 0.2s, border-color 0.2s;
}

.qa-item[open] .qa-item__icon {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
  transform: rotate(45deg);
}

.qa-item__a p {
  max-width: 640px;
  margin: -4px 0 26px;
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.7;
}

.qa-item[open] .qa-item__a {
  animation: fade-down 0.3s var(--ease);
}

@keyframes fade-down {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 行动区 ---------- */

.cta {
  padding: 0 0 128px;
}

.cta__panel {
  position: relative;
  overflow: hidden;
  padding: 96px 32px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--bg-tint);
  text-align: center;
}

.cta__panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center;
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 50%, #000 10%, transparent 70%);
  mask-image: radial-gradient(ellipse 60% 70% at 50% 50%, #000 10%, transparent 70%);
  opacity: 0.7;
  pointer-events: none;
}

.cta__panel > * {
  position: relative;
}

.cta__mark {
  display: inline-flex;
  margin-bottom: 32px;
  padding: 16px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow-float);
  color: var(--ink);
}

.cta h2 {
  max-width: 780px;
  margin: 0 auto;
  font-size: clamp(34px, 4.6vw, 58px);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

.cta p {
  max-width: 520px;
  margin: 20px auto 36px;
  color: var(--text-2);
  font-size: 18px;
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

/* ---------- 页脚 ---------- */

.footer {
  padding: 72px 0 40px;
  border-top: 1px solid var(--line);
  background: #fff;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.7fr repeat(3, minmax(0, 1fr));
  gap: 40px;
  padding-bottom: 56px;
}

.footer__brand p {
  margin: 16px 0 0;
  color: var(--text-3);
  font-size: 14.5px;
}

.footer__col h2 {
  margin: 0 0 16px;
  font-size: 13.5px;
  letter-spacing: 0;
}

.footer__col ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer__col a {
  color: var(--text-2);
  font-size: 14.5px;
  text-decoration: none;
  transition: color 0.15s;
}

.footer__col a:hover {
  color: var(--ink);
}

.footer__bottom {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-top: 28px;
  border-top: 1px solid var(--line-2);
}

.footer__legal p {
  max-width: 860px;
  margin: 0 0 4px;
  color: var(--text-3);
  font-size: 13px;
  line-height: 1.65;
}

.footer__legal a {
  color: inherit;
}

/* ---------- 法务页与联系页的页首 ---------- */

.page-head {
  position: relative;
  padding: 88px 0 56px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-tint), #fff);
}

.page-head--legal {
  padding-bottom: 0;
}

.page-head h1 {
  margin: 0;
  font-size: clamp(40px, 5.4vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

.page-head__lead {
  max-width: 680px;
  margin: 20px 0 0;
  color: var(--text-2);
  font-size: 19px;
  line-height: 1.6;
}

.page-head__meta {
  margin: 16px 0 0;
  color: var(--text-3);
  font-size: 13.5px;
}

.legal-tabs {
  display: flex;
  gap: 28px;
  margin-top: 44px;
  overflow-x: auto;
  scrollbar-width: none;
}

.legal-tabs a {
  flex: none;
  margin-bottom: -1px;
  padding: 14px 0;
  border-bottom: 2px solid transparent;
  color: var(--text-2);
  font-size: 14.5px;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.legal-tabs a:hover {
  color: var(--ink);
}

.legal-tabs a[aria-current] {
  border-bottom-color: var(--brand);
  color: var(--ink);
}

/* ---------- 法务正文 ---------- */

.legal {
  display: grid;
  grid-template-columns: 232px minmax(0, 728px);
  gap: 88px;
  padding-top: 64px;
  padding-bottom: 128px;
}

.toc {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  align-self: start;
  max-height: calc(100vh - var(--header-h) - 64px);
  overflow: auto;
}

.toc__title {
  margin: 0 0 14px;
  color: var(--text-3);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.toc ol,
.toc-mobile ol {
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
  list-style: none;
}

.toc a,
.toc-mobile a {
  display: flex;
  gap: 10px;
  margin-left: -1px;
  padding: 6px 0 6px 14px;
  border-left: 2px solid transparent;
  color: var(--text-3);
  font-size: 13.5px;
  line-height: 1.45;
  text-decoration: none;
  transition: color 0.15s, border-color 0.15s;
}

.toc a span,
.toc-mobile a span {
  min-width: 16px;
  color: var(--text-4);
  font-variant-numeric: tabular-nums;
}

.toc a:hover {
  color: var(--ink);
}

.toc a.is-active {
  border-left-color: var(--brand);
  color: var(--ink);
  font-weight: 500;
}

.toc-mobile {
  display: none;
}

.prose {
  min-width: 0;
  color: var(--text-2);
  font-size: 16px;
  line-height: 1.75;
}

.summary {
  margin-bottom: 56px;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-tint);
}

.summary h2 {
  margin: 0 0 16px;
  font-size: 14px;
  letter-spacing: 0;
}

.summary ul {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.summary li {
  display: flex;
  gap: 12px;
  color: var(--text);
  font-size: 15.5px;
  line-height: 1.6;
}

.summary .icon {
  margin-top: 4px;
  color: var(--ok);
}

.prose__section {
  margin-bottom: 44px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.prose__section > :not(h2) {
  margin-left: 36px;
}

.prose h2 {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0 0 14px;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.prose__num {
  min-width: 20px;
  color: var(--text-4);
  font-size: 15px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.prose__anchor {
  color: var(--text-4) !important;
  font-weight: 400;
  text-decoration: none !important;
  opacity: 0;
  transition: opacity 0.15s;
}

.prose h2:hover .prose__anchor,
.prose__anchor:focus-visible {
  opacity: 1;
}

.prose p {
  margin-top: 0;
  margin-bottom: 14px;
}

.prose ul,
.prose ol {
  margin-top: 0;
  margin-bottom: 14px;
  padding-left: 22px;
}

.prose li {
  margin-bottom: 8px;
  padding-left: 4px;
}

.prose li::marker {
  color: var(--text-4);
}

.prose strong {
  color: var(--ink);
  font-weight: 600;
}

.prose ol.steps {
  padding-left: 0;
  counter-reset: step;
  list-style: none;
}

.prose ol.steps li {
  position: relative;
  margin-bottom: 16px;
  padding-left: 44px;
  counter-increment: step;
}

.prose ol.steps li::before {
  content: counter(step);
  position: absolute;
  top: 0;
  left: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 600;
}

.copy-card {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 24px;
  margin-top: 56px;
  padding: 24px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--bg-tint);
}

.copy-card h2 {
  margin: 0 0 4px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.copy-card p {
  margin: 0;
  color: var(--text-2);
  font-size: 14.5px;
}

.copy-card__value {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 500;
}

/* ---------- 联系页 ---------- */

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 460px);
  gap: 48px;
  align-items: start;
  padding-top: 64px;
  padding-bottom: 128px;
}

.contact__cards {
  display: grid;
  gap: 16px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.contact-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.25s var(--ease);
}

.contact-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 12px 32px -20px rgba(16, 24, 40, 0.25);
}

.contact-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg-tint);
  color: var(--ink);
}

.contact-card h2 {
  margin: 0;
  font-size: 15px;
  letter-spacing: -0.005em;
}

.contact-card p {
  margin: 2px 0 0;
  color: var(--text-3);
  font-size: 13.5px;
}

.contact-card__value {
  margin-top: 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.contact-card__actions {
  display: flex;
  gap: 8px;
}

.contact__tip {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 8px 0 0;
  padding: 16px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: 12px;
  color: var(--text-2);
  font-size: 14.5px;
}

.contact__tip .icon {
  margin-top: 3px;
  color: var(--brand);
}

.company {
  position: sticky;
  top: calc(var(--header-h) + 32px);
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--bg-tint);
}

.company h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.company dl {
  margin: 0;
}

.dl-row {
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.dl-row dt {
  margin-bottom: 4px;
  color: var(--text-3);
  font-size: 12.5px;
}

.dl-row dd {
  margin: 0;
  color: var(--ink);
  font-size: 14.5px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

.mono {
  font-family: ui-monospace, 'SF Mono', SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13.5px;
  letter-spacing: 0.03em;
}

.company__privacy {
  margin-top: 12px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
}

.company__privacy h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 6px;
  font-size: 14px;
}

.company__privacy p {
  margin: 0;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.6;
}

/* ---------- 404 ---------- */

.not-found {
  padding: 160px 0 200px;
  text-align: center;
}

.not-found__code {
  margin: 0 0 16px;
  color: var(--brand);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.not-found h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 56px);
  letter-spacing: -0.04em;
}

.not-found p {
  margin: 16px 0 32px;
  color: var(--text-2);
  font-size: 18px;
}

/* ---------- 提示条 ---------- */

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 80;
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--text);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow-float);
  opacity: 0;
  transform: translate(-50%, 8px);
  transition: opacity 0.2s, transform 0.2s var(--ease);
  pointer-events: none;
}

.toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 进场动画 ---------- */

.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.js [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .live i,
  .typing span {
    animation: none;
  }
}

/* ---------- 响应式 ---------- */

@media (max-width: 1180px) {
  .app {
    grid-template-columns: 60px 280px minmax(0, 1fr);
  }

  .app__side {
    display: none;
  }

  .float--lead {
    right: -16px;
    bottom: 220px;
  }

  .float--replied {
    left: -16px;
  }

  .legal {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 56px;
  }
}

@media (max-width: 1024px) {
  .nav a {
    padding: 8px 9px;
  }

  .hero__top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 56px;
  }

  .hero__lead {
    max-width: 620px;
  }

  .bento {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .card--wide {
    grid-column: span 2;
  }

  .card--extras {
    grid-column: span 2;
  }

  .card--extras .extras {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .faq {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .section-head--side {
    position: static;
  }

  .contact {
    grid-template-columns: 1fr;
  }

  .company {
    position: static;
  }

  .footer__top {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer__brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 900px) {
  .nav,
  .header__actions > .lang,
  .header__actions > .btn {
    display: none;
  }

  .menu-btn {
    display: inline-flex;
  }

  .mobile-menu {
    position: fixed;
    inset: var(--header-h) 0 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 32px;
    padding: 8px 20px 32px;
    overflow: auto;
    background: #fff;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s var(--ease), visibility 0.2s;
  }

  .menu-open {
    overflow: hidden;
  }

  .menu-open .mobile-menu {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .mobile-menu__nav a {
    display: block;
    padding: 16px 0;
    border-bottom: 1px solid var(--line-2);
    color: var(--ink);
    font-size: 22px;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-decoration: none;
  }

  .mobile-menu__foot {
    display: grid;
    justify-items: start;
    gap: 20px;
  }

  .legal {
    grid-template-columns: 1fr;
    gap: 0;
    padding-top: 32px;
  }

  .toc {
    display: none;
  }

  .toc-mobile {
    display: block;
    margin-bottom: 32px;
    border: 1px solid var(--line);
    border-radius: 12px;
  }

  .toc-mobile summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    color: var(--ink);
    font-size: 14.5px;
    font-weight: 500;
    list-style: none;
    cursor: pointer;
  }

  .toc-mobile summary::-webkit-details-marker {
    display: none;
  }

  .toc-mobile[open] summary .icon {
    transform: rotate(180deg);
  }

  .toc-mobile ol {
    margin: 0 16px 16px;
  }
}

@media (max-width: 820px) {
  .app {
    grid-template-columns: minmax(0, 1fr);
    height: 560px;
  }

  .app__rail,
  .app__list {
    display: none;
  }

  .chat__head .mini-btn {
    display: none;
  }

  .float--replied {
    left: 12px;
    bottom: -20px;
  }

  .float--lead {
    right: 12px;
    top: -20px;
    bottom: auto;
  }

  .steps-row {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .trust-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --header-h: 60px;
  }

  .container {
    padding: 0 20px;
  }

  .section {
    padding: 88px 0;
  }

  .hero {
    padding: 40px 0 80px;
  }

  .hero h1 {
    font-size: 46px;
    letter-spacing: -0.045em;
  }

  .hero__lead {
    font-size: 17px;
  }

  .hero__actions .btn {
    flex: 1 1 auto;
  }

  .app {
    height: 540px;
    border-radius: 14px;
  }

  .chat__head {
    padding: 12px 14px;
  }

  .chat__head .tag--lg {
    display: none;
  }

  .chat__msgs {
    padding: 16px 14px;
  }

  .msg {
    max-width: 88%;
  }

  .chat__composer {
    padding: 12px 14px;
    font-size: 12.5px;
  }

  .float--replied {
    display: none;
  }

  .platforms {
    padding-bottom: 88px;
  }

  .platforms__list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
    max-width: 320px;
    margin: 0 auto;
  }

  .platforms__list li {
    font-size: 16px;
  }

  .section-head {
    margin-bottom: 40px;
  }

  .section-head__lead {
    font-size: 17px;
  }

  .bento {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card--wide,
  .card--extras {
    grid-column: auto;
    flex-direction: column;
  }

  .card--wide .card__visual {
    order: 0;
    min-height: 0;
    height: auto;
    padding: 28px 20px;
    border-left: 0;
    border-bottom: 1px solid var(--line-2);
  }

  .card--wide .card__visual,
  .card--wide .card__text {
    flex: none;
  }

  .card--wide .card__text {
    padding: 24px 24px 28px;
  }

  .card--wide h3 {
    font-size: 18px;
  }

  .card__text {
    padding: 22px 24px 26px;
  }

  .card--extras .extras {
    grid-template-columns: 1fr;
  }

  .fv-row:nth-child(2) {
    margin: 0 -6px 0 6px;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }

  .trust-item {
    padding: 28px 24px;
  }

  .qa-item summary {
    font-size: 16px;
  }

  .cta {
    padding-bottom: 88px;
  }

  .cta__panel {
    padding: 64px 20px;
    border-radius: 20px;
  }

  .footer__top {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-head {
    padding: 56px 0 40px;
  }

  .page-head--legal {
    padding-bottom: 0;
  }

  .page-head__lead {
    font-size: 17px;
  }

  .prose__section > :not(h2) {
    margin-left: 0;
  }

  .prose h2 {
    font-size: 20px;
    gap: 12px;
  }

  .summary {
    padding: 22px 20px;
  }

  .contact-card {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .contact-card__actions {
    grid-column: 1 / -1;
  }

  .company {
    padding: 22px 20px;
  }
}