/* 千面演示站。与工作台同一套视觉：纸面、墨、一点朱砂。浅色，字少，留白撑质感。 */

:root {
  --paper: #f6f5f2;
  --surface: #ffffff;
  --tint: #efede8;
  --ink: #1c1b19;
  --ink-2: #57544e;
  --ink-3: #8b877f;
  --line: #e3e0d9;
  --accent: #d2462e;
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.wrap {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 32px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 10px;
  border: 1px solid #d6d2ca;
  background: var(--surface);
  color: var(--ink);
  font: 600 15px/1 var(--sans);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
}

.btn:hover {
  border-color: #b5b1a8;
}

.btn:active {
  transform: translateY(1px);
}

.btn.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.btn.primary:hover {
  background: #33312d;
}

.btn.sm {
  height: 36px;
  padding: 0 16px;
  font-size: 14px;
  border-radius: 8px;
}

.btn.block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
}

/* 导航 */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 245, 242, 0.86);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.nav-inner {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font: 600 20px/1 var(--serif);
  letter-spacing: 0.12em;
}

.links {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 14.5px;
  color: var(--ink-2);
}

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

[hidden] {
  display: none !important;
}

.nav-inner > .btn + .btn {
  margin-left: -20px;
}

/* 首屏 */
.hero {
  padding: 72px 0 56px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.12fr;
  gap: 40px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 22px;
  font-size: 14px;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}

.hero h1 {
  margin: 0 0 22px;
  font: 600 64px/1.18 var(--serif);
}

.lead {
  margin: 0 0 34px;
  max-width: 440px;
  font-size: 18px;
  color: var(--ink-2);
}

.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.fine {
  margin: 22px 0 0;
  font-size: 13.5px;
  color: var(--ink-3);
}

.stage {
  position: relative;
  height: 520px;
}

.threads {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.threads path {
  fill: none;
  stroke: #cfcac0;
  stroke-width: 1.2;
  stroke-dasharray: 4 6;
  animation: flow 18s linear infinite;
}

@keyframes flow {
  to {
    stroke-dashoffset: -200;
  }
}

.product {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -62%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  50% {
    transform: translate(-50%, -65%);
  }
}

.product-label {
  margin-top: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--line);
  font-size: 13px;
  display: flex;
  gap: 10px;
  white-space: nowrap;
  box-shadow: 0 8px 24px -14px rgba(28, 27, 25, 0.3);
}

.product-label span {
  color: var(--ink-3);
}

.facet-card {
  position: absolute;
  z-index: 3;
  width: 228px;
  padding: 14px 16px 15px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 1px 2px rgba(28, 27, 25, 0.04), 0 18px 40px -22px rgba(28, 27, 25, 0.35);
  font-size: 12.5px;
  line-height: 1.6;
  transition: translate 0.4s var(--ease);
  opacity: 0;
  animation: card-in 0.8s var(--ease) forwards;
}

@keyframes card-in {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.97);
  }
  to {
    opacity: 1;
  }
}

.c-taobao {
  left: 0;
  top: 18px;
  animation-delay: 0.15s;
}

.c-xhs {
  right: 0;
  top: 0;
  animation-delay: 0.3s;
}

.c-amazon {
  left: 0;
  bottom: 0;
  animation-delay: 0.45s;
}

.c-douyin {
  right: 0;
  bottom: 14px;
  animation-delay: 0.6s;
}

.fc-head {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
}

.pf {
  font-weight: 600;
  font-size: 11.5px;
  padding: 1px 8px;
  border-radius: 999px;
  background: #f1efea;
}

.c-xhs .pf {
  background: #fdebe8;
  color: #b8321c;
}

.dim {
  color: var(--ink-3);
  font-size: 11.5px;
}

.fc-title {
  margin: 0 0 6px;
  font-weight: 600;
  font-size: 13px;
  line-height: 1.5;
}

.fc-body {
  margin: 0 0 4px;
  color: var(--ink-2);
}

.fc-body b {
  font-weight: 600;
  color: var(--ink);
  margin-right: 4px;
}

.en {
  font-family: Georgia, "Times New Roman", serif;
}

.facet-card ul {
  margin: 0;
  padding-left: 16px;
  color: var(--ink-2);
}

.tags {
  margin: 4px 0 0;
  color: #3b5f8a;
}

/* 平台带 */
.strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.strip-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 22px;
  padding-bottom: 22px;
  color: var(--ink-3);
  font-size: 14.5px;
}

/* 区块 */
.section {
  padding: 104px 0;
}

.section.tint {
  background: var(--tint);
}

.h2 {
  margin: 0 0 12px;
  font: 600 38px/1.3 var(--serif);
}

.sub {
  margin: 0 0 44px;
  color: var(--ink-3);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 52px;
}

.step .n {
  display: block;
  font: 600 15px/1 var(--serif);
  color: var(--accent);
  margin-bottom: 18px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.step h3,
.why h3,
.scene h3,
.plan h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
}

.step p,
.why p,
.scene p {
  margin: 0;
  color: var(--ink-2);
  font-size: 15px;
}

.scenes {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
}

.scene {
  background: var(--paper);
  padding: 24px 22px 26px;
  min-height: 168px;
}

.scene.live {
  background: var(--surface);
}

.scene .state {
  display: inline-block;
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 14px;
}

.scene.live .state {
  color: #2f7a52;
}

.scene.live .state::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  margin-right: 6px;
  vertical-align: 2px;
}

.scene p {
  font-size: 14px;
}

.whys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  margin-top: 52px;
}

.why {
  border-top: 1px solid var(--ink);
  padding-top: 20px;
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.plan {
  display: flex;
  flex-direction: column;
  padding: 30px 28px;
  border-radius: 16px;
  background: var(--paper);
  border: 1px solid var(--line);
}

.plan.featured {
  background: var(--surface);
  border-color: var(--ink);
  box-shadow: 0 24px 50px -32px rgba(28, 27, 25, 0.45);
}

.price {
  margin: 0 0 20px;
  font: 600 26px/1.3 var(--serif);
}

.plan ul {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  color: var(--ink-2);
  font-size: 15px;
  flex: 1;
}

.plan li {
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
}

.plan li:last-child {
  border-bottom: 0;
}

/* 联系 */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 72px;
  align-items: start;
}

.contact-copy p {
  color: var(--ink-2);
  margin: 0 0 28px;
}

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

.checks li {
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}

.checks li::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  margin-right: 12px;
  vertical-align: 2px;
  transform: rotate(45deg);
}

.lead-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 32px;
  border-radius: 18px;
  background: var(--surface);
  border: 1px solid var(--line);
}

.lead-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  font: 400 15px/1.5 var(--sans);
  color: var(--ink);
  border: 1px solid #d6d2ca;
  border-radius: 8px;
  background: var(--surface);
  padding: 10px 12px;
  outline: none;
  width: 100%;
  min-width: 0;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.lead-form select {
  appearance: none;
  height: 44px;
}

.lead-form input:focus,
.lead-form select:focus,
.lead-form textarea:focus {
  border-color: var(--ink);
  box-shadow: 0 0 0 3px rgba(28, 27, 25, 0.07);
}

.row2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.hp {
  position: absolute;
  left: -9999px;
}

.form-msg {
  margin: 0;
  min-height: 1.4em;
  font-size: 14px;
}

.form-msg.ok {
  color: #2f7a52;
}

.form-msg.err {
  color: #c23a2b;
}

.lead-form.sent label,
.lead-form.sent .row2 {
  opacity: 0.5;
  pointer-events: none;
}

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

.foot-inner {
  display: flex;
  justify-content: space-between;
  padding-top: 28px;
  padding-bottom: 40px;
  font-size: 13.5px;
  color: var(--ink-3);
}

/* 响应式 */
@media (max-width: 980px) {
  .hero-inner,
  .contact {
    grid-template-columns: 1fr;
  }
  .hero h1 {
    font-size: 48px;
  }
  .stage {
    height: 480px;
    max-width: 560px;
    width: 100%;
    margin: 0 auto;
  }
  .scenes,
  .whys {
    grid-template-columns: repeat(2, 1fr);
  }
  .plans {
    grid-template-columns: 1fr;
  }
  .contact {
    gap: 40px;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 0 16px;
  }
  .links {
    display: none;
  }
  .nav-inner {
    justify-content: space-between;
  }
  .hero {
    padding: 40px 0 24px;
  }
  .hero h1 {
    font-size: 40px;
  }
  .lead {
    font-size: 16px;
  }
  .stage {
    height: 560px;
  }
  .facet-card {
    width: 46%;
    font-size: 11.5px;
    padding: 12px;
  }
  .c-taobao,
  .c-amazon {
    left: 0;
  }
  .c-xhs,
  .c-douyin {
    right: 0;
  }
  .c-amazon {
    bottom: 0;
  }
  .c-douyin {
    bottom: 10px;
  }
  .product svg {
    width: 120px;
    height: 144px;
  }
  .section {
    padding: 64px 0;
  }
  .h2 {
    font-size: 28px;
  }
  .steps,
  .scenes,
  .whys {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .scenes {
    gap: 1px;
  }
  .scene {
    min-height: 0;
  }
  .row2 {
    grid-template-columns: 1fr;
  }
  .lead-form {
    padding: 22px;
  }
  .strip-inner {
    justify-content: flex-start;
    font-size: 13.5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .facet-card {
    opacity: 1;
  }
}