/* ============================================================
   龙湖集团 · 客户服务栏目
   Shared Stylesheet  —  member / longzhu / app
   视觉基准：官网「客户服务 > 龙湖会员」香槟金 + 暖白体系
   ============================================================ */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

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

body,
h1, h2, h3, h4, p, figure, blockquote, dl, dd { margin: 0; }

ul, ol { margin: 0; padding: 0; list-style: none; }

img, svg { display: block; max-width: 100%; }

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

/* ---------- 2. Tokens ---------- */
:root {
  --ink:        #3a2f24;
  --ink-deep:   #241c14;
  --ink-soft:   #55463a;
  --gold:       #b08a4b;
  --gold-deep:  #8a6a35;
  --gold-soft:  #d9c09a;
  --paper:      #ffffff;
  --paper-warm: #faf6ef;
  --paper-cool: #f6f2ea;
  --text:       #2e2720;
  --muted:      #7d7164;
  --muted-light:#a2968a;
  --line:       rgba(58, 47, 36, .14);
  --line-soft:  rgba(58, 47, 36, .08);
  --line-dark:  rgba(255, 255, 255, .16);

  --maxw: 1240px;
  --gutter: 40px;

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 76px;
}

/* ---------- 3. Base ---------- */
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
               "Microsoft YaHei", -apple-system, BlinkMacSystemFont,
               "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--ink); color: #fff; }

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* 英文小标 */
.eyebrow {
  display: inline-block;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 11px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--gold);
}

/* ---------- 4. Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: var(--header-h);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), box-shadow .4s var(--ease),
              background .4s var(--ease);
}

.site-header.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: 0 12px 30px -24px rgba(58, 47, 36, .45);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex: none;
}

.brand__cn {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--ink);
}

.brand__en {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .34em;
  text-transform: uppercase;
  color: var(--muted-light);
}

/* 主导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 100%;
}

.nav__item { position: relative; height: 100%; display: flex; align-items: center; }

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--text);
  transition: color .3s var(--ease);
}

.nav__link:hover { color: var(--gold); }

.nav__item.is-active > .nav__link { color: var(--gold); }

.nav__item.is-active > .nav__link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 22px;
  height: 1px;
  background: var(--gold);
}

.nav__caret {
  width: 7px;
  height: 7px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform .3s var(--ease);
}

.nav__drop {
  position: absolute;
  top: calc(100% - 6px);
  left: 50%;
  min-width: 214px;
  padding: 10px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: 0 26px 60px -34px rgba(58, 47, 36, .5);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: opacity .3s var(--ease), transform .3s var(--ease),
              visibility .3s var(--ease);
}

.nav__item:hover .nav__drop,
.nav__item.is-open .nav__drop {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.nav__drop a {
  display: block;
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--muted);
  transition: color .25s var(--ease), background .25s var(--ease);
}

.nav__drop a:hover { color: var(--ink); background: var(--paper-warm); }

.nav__drop a.is-current {
  color: var(--gold-deep);
  font-weight: 600;
  background: var(--paper-warm);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  margin-right: -10px;
  position: relative;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 12px;
  width: 20px;
  height: 1px;
  background: var(--ink);
  content: "";
  transition: transform .35s var(--ease), opacity .3s var(--ease);
}

.nav-toggle span { top: 21px; }
.nav-toggle span::before { left: 0; top: -6px; }
.nav-toggle span::after { left: 0; top: 6px; }

.nav-toggle.is-open span { background: transparent; }
.nav-toggle.is-open span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 5. Breadcrumb ---------- */
.crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--muted-light);
}

.crumbs a { transition: color .25s var(--ease); }
.crumbs a:hover { color: var(--gold); }

.crumbs__sep {
  width: 5px;
  height: 5px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
  opacity: .5;
}

.crumbs__current { color: var(--ink); }

/* ---------- 6. Hero ---------- */
.hero { position: relative; }

/* 6.1 图片首屏：会员页主视觉 */
.hero--image {
  display: flex;
  align-items: center;
  min-height: 640px;
  padding-top: calc(var(--header-h) + 24px);
  background: #f4e8d6;
  overflow: hidden;
}

.hero--image .hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("../img/banner.jpg");
  background-size: cover;
  background-position: 62% center;
  background-repeat: no-repeat;
}

.hero--image .hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg,
      rgba(255, 252, 246, .96) 0%,
      rgba(255, 251, 244, .88) 30%,
      rgba(255, 250, 242, .42) 52%,
      rgba(255, 250, 242, 0) 68%);
}

.hero--image .hero__inner { position: relative; z-index: 1; width: 100%; }

.hero--image .hero__grid {
  display: block;
  padding-block: 64px 88px;
}

.hero--image .hero__head { max-width: 560px; }

/* 6.2 纯色首屏 */
.hero--paper {
  padding-top: calc(var(--header-h) + 56px);
  background: var(--paper);
  overflow: hidden;
}

.hero--paper .hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: 64px;
  padding-block: 64px 96px;
}

/* 6.3 暖底首屏 */
.hero--warm {
  padding-top: calc(var(--header-h) + 56px);
  background: var(--paper-warm);
  overflow: hidden;
}

.hero--warm .hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  align-items: center;
  gap: 64px;
  padding-block: 64px 56px;
}

.hero__inner {
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.hero__title {
  margin-top: 22px;
  font-size: clamp(40px, 5.2vw, 68px);
  font-weight: 500;
  line-height: 1.14;
  letter-spacing: .04em;
  color: var(--ink);
}

.hero__sub {
  display: block;
  margin-top: 14px;
  font-size: clamp(20px, 2.1vw, 27px);
  font-weight: 300;
  letter-spacing: .14em;
  color: var(--ink-soft);
}

.hero__desc {
  max-width: 34em;
  margin-top: 26px;
  font-size: 16px;
  line-height: 2;
  color: var(--muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 28px;
  margin-top: 40px;
}

/* 6.4 珑珠主视觉（官方高清素材，静态） */
.lz-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.lz-visual img {
  position: relative;
  z-index: 1;
  width: clamp(240px, 25vw, 320px);
  height: auto;
  filter: drop-shadow(0 30px 46px rgba(150, 106, 48, .2));
}

/* 6.5 手机模型 */
.phone {
  position: relative;
  width: clamp(206px, 21vw, 248px);
  aspect-ratio: 9 / 18.4;
  padding: 9px;
  border-radius: 32px;
  background: linear-gradient(160deg, #45372a, #1c1510);
  box-shadow:
    0 46px 80px -40px rgba(58, 47, 36, .48),
    inset 0 0 0 1px rgba(255, 255, 255, .12);
}

.phone__screen {
  position: relative;
  height: 100%;
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(175deg, #2b2118 0%, #1a1310 52%, #120d0a 100%);
  padding: 24px 14px;
}

.phone__notch {
  position: absolute;
  top: 9px;
  left: 50%;
  transform: translateX(-50%);
  width: 54px;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, .16);
}

.phone__hello {
  font-size: 9px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: rgba(217, 192, 154, .75);
}

.phone__title {
  margin-top: 5px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .1em;
  color: #fff;
}

.phone__chip {
  margin-top: 16px;
  padding: 13px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(217, 192, 154, .22), rgba(217, 192, 154, .05));
  border: 1px solid rgba(217, 192, 154, .26);
}

.phone__num {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--gold-soft);
}

.phone__num span {
  font-size: 9px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .5);
  margin-left: 4px;
}

.phone__label {
  margin-top: 4px;
  font-size: 9px;
  letter-spacing: .14em;
  color: rgba(255, 255, 255, .48);
}

.phone__list {
  display: grid;
  gap: 8px;
  margin-top: 16px;
}

.phone__row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 10px;
  border-radius: 9px;
  background: rgba(255, 255, 255, .06);
}

.phone__dot {
  width: 16px;
  height: 16px;
  flex: none;
  border-radius: 5px;
  background: rgba(217, 192, 154, .34);
}

.phone__bar {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: rgba(255, 255, 255, .18);
}

.phone__bar--short { flex: 0 0 34%; background: rgba(217, 192, 154, .5); }

/* 手机外围金色光晕 */
.phone-stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.phone-stage::before {
  content: "";
  position: absolute;
  width: 78%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(176, 138, 75, .2), transparent 66%);
  filter: blur(18px);
}

.phone-stage .phone { position: relative; z-index: 1; }

/* ---------- 7. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 30px;
  font-size: 13.5px;
  letter-spacing: .12em;
  border: 1px solid var(--line);
  transition: color .35s var(--ease), background .35s var(--ease),
              border-color .35s var(--ease);
}

.btn__arrow {
  position: relative;
  width: 16px;
  height: 1px;
  background: currentColor;
  transition: width .35s var(--ease);
}

.btn__arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3px;
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}

.btn:hover .btn__arrow { width: 24px; }

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

.btn--solid:hover {
  background: var(--gold);
  border-color: var(--gold);
}

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

.btn--gold:hover {
  background: var(--gold-deep);
  border-color: var(--gold-deep);
}

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

.link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  letter-spacing: .1em;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  padding-bottom: 4px;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}

.link:hover { color: var(--gold); border-color: var(--gold); }

/* ---------- 8. QR ---------- */
.qr-box {
  display: flex;
  align-items: center;
  gap: 18px;
}

.qr {
  width: 96px;
  height: 96px;
  flex: none;
  padding: 6px;
  background: #fff;
  border: 1px solid var(--line);
}

.qr-box > figcaption {
  font-size: 13px;
  line-height: 1.85;
  letter-spacing: .04em;
  color: var(--muted);
}

.qr-box > figcaption strong {
  display: block;
  margin-bottom: 2px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  color: var(--ink);
}

/* ---------- 9. Section ---------- */
.section { padding-block: 100px; }

.section--warm { background: var(--paper-warm); }
.section--cool { background: var(--paper-cool); }

/* 极淡磨砂纹理，呼应官网底图 */
.section--texture {
  position: relative;
  background-color: #fdfbf7;
  background-image: url("../img/cus-03.jpg");
  background-size: cover;
  background-position: center;
}

.section--texture-soft {
  position: relative;
  background-color: #fefdfa;
  background-image: url("../img/cus-01.jpg");
  background-size: cover;
  background-position: center;
}

/* 压淡底图，避免纹理抢内容 */
.section--texture::before,
.section--texture-soft::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, .62);
  pointer-events: none;
}

.section--texture > .wrap,
.section--texture-soft > .wrap { position: relative; z-index: 1; }

.section__head {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  align-items: end;
  gap: 44px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 56px;
}

.section__title {
  margin-top: 14px;
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: .05em;
  color: var(--ink);
}

.section__desc {
  font-size: 15px;
  line-height: 2;
  color: var(--muted);
}

.section__desc + .section__desc { margin-top: 8px; }

/* 居中标题 */
.section__head--center {
  display: block;
  text-align: center;
  border-bottom: 0;
  padding-bottom: 0;
  margin-bottom: 52px;
}

.section__head--center .section__desc {
  margin-inline: auto;
  max-width: 44em;
  margin-top: 16px;
}

/* ---------- 10. Scene grid（7 场景 · 真实图标） ---------- */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  background: var(--line);
  border: 1px solid var(--line);
  gap: 1px;
}

.scene {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 44px 16px 40px;
  background: var(--paper);
  transition: background .4s var(--ease);
}

.scene:hover { background: var(--paper-warm); }

.scene__icon {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  margin-bottom: 20px;
}

.scene__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  image-rendering: -webkit-optimize-contrast;
  transition: transform .45s var(--ease), opacity .35s var(--ease);
}

.scene:hover .scene__icon img { transform: translateY(-4px); }

.scene__name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--ink);
  line-height: 1.6;
}

.scene__desc {
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted-light);
}

/* ---------- 11. Feature 双栏 ---------- */
.feature {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.feature__body {
  position: relative;
  padding: 54px 44px 58px;
  background: var(--paper);
  overflow: hidden;
  transition: background .4s var(--ease);
}

.feature__body { background: var(--paper); }

.feature__body:hover { background: var(--paper-warm); }

.feature__en {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 10.5px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
}

.feature__title {
  margin-top: 16px;
  font-size: clamp(23px, 2.4vw, 30px);
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--ink);
}

.feature__desc {
  margin-top: 14px;
  font-size: 14.5px;
  line-height: 2;
  color: var(--muted);
}

.feature__body .card__tags { margin-top: 24px; }

/* ---------- 12. 大数字 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.stat { padding: 36px 24px 0 0; }

.stat + .stat { padding-left: 32px; border-left: 1px solid var(--line); }

.stat__num {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 300;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--gold-deep);
}

.stat__num small {
  font-size: .36em;
  letter-spacing: .1em;
  margin-left: 6px;
  color: var(--muted-light);
}

.stat__label {
  margin-top: 14px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
}

.hero--warm .stats { padding-bottom: 76px; }

/* ---------- 13. Steps ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
}

.step { position: relative; padding: 0 32px 0 0; }

.step:last-child { padding-right: 0; }

.step__num {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 20px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 10.5px;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--gold);
}

.step__num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

.step__title {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--ink);
}

.step__desc {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--muted);
}

/* ---------- 14. Activity（大图 + 活动切换） ---------- */
.activity {
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(0, .78fr);
  gap: 40px;
  align-items: stretch;
}

.activity__stage {
  position: relative;
  overflow: hidden;
  background: var(--paper-warm);
  aspect-ratio: 16 / 9.6;
}

.activity__stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  position: absolute;
  inset: 0;
  transition: opacity .55s var(--ease), transform 1.4s var(--ease);
}

.activity__stage img.is-active { opacity: 1; }

.activity__list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.activity__item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 4px 14px 0;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: color .3s var(--ease), padding-left .35s var(--ease);
}

.activity__item:hover { color: var(--gold); padding-left: 6px; }

.activity__idx {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 10.5px;
  letter-spacing: .18em;
  color: var(--muted-light);
}

.activity__name {
  font-size: 16.5px;
  font-weight: 500;
  letter-spacing: .06em;
  transition: color .3s var(--ease);
}

.activity__item.is-active .activity__name { color: var(--gold-deep); }
.activity__item.is-active .activity__idx { color: var(--gold); }

.activity__item.is-active::after {
  content: "";
  width: 18px;
  height: 1px;
  margin-left: auto;
  background: var(--gold);
}

/* ---------- 15. Gallery（APP 功能图） ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.gallery__item {
  position: relative;
  display: block;
  overflow: hidden;
  background: #0d0d0d;
  aspect-ratio: 800 / 599;
}

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease), opacity .5s var(--ease);
}

.gallery__item:hover img { transform: scale(1.035); opacity: .94; }

.gallery__label {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 46px 28px 22px;
  font-size: 13px;
  letter-spacing: .1em;
  color: #fff;
  background: linear-gradient(0deg, rgba(0, 0, 0, .58), transparent);
}

/* ---------- 16. Cards ---------- */
.grid { display: grid; gap: 1px; background: var(--line); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card {
  position: relative;
  background: var(--paper);
  padding: 38px 34px 40px;
  transition: background .4s var(--ease);
}

.card:hover { background: var(--paper-warm); }

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

.card__idx {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--gold);
}

.card__title {
  margin-top: 16px;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: .05em;
  line-height: 1.6;
  color: var(--ink);
}

.card__desc {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--muted);
}

.card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.tag {
  padding: 4px 10px;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--muted);
  border: 1px solid var(--line);
}

/* ---------- 17. FAQ ---------- */
.faq { border-top: 1px solid var(--line); }

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

.faq__q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  padding: 26px 0;
  text-align: left;
  font-size: 16.5px;
  font-weight: 500;
  letter-spacing: .04em;
  color: var(--ink);
  transition: color .3s var(--ease);
}

.faq__q:hover { color: var(--gold); }

.faq__icon {
  position: relative;
  width: 13px;
  height: 13px;
  flex: none;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform .35s var(--ease), opacity .35s var(--ease);
}

.faq__icon::before { left: 0; top: 6px; width: 13px; height: 1px; }
.faq__icon::after { left: 6px; top: 0; width: 1px; height: 13px; }

.faq__item.is-open .faq__icon::after { transform: rotate(90deg); opacity: 0; }

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s var(--ease);
}

.faq__a p {
  padding-bottom: 28px;
  max-width: 62em;
  font-size: 14.5px;
  line-height: 2;
  color: var(--muted);
}

/* ---------- 18. Download ---------- */
.download {
  display: flex;
  align-items: center;
  gap: 56px;
}

.download .qr { width: 148px; height: 148px; padding: 8px; }

.download__title {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--ink);
}

.download__desc {
  margin-top: 10px;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.95;
  color: var(--muted);
}

.download__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
}

/* ---------- 19. Footer ---------- */
.site-footer {
  background: var(--ink-deep);
  color: rgba(255, 255, 255, .6);
  padding-block: 70px 38px;
}

.site-footer__top {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) repeat(2, minmax(0, .6fr));
  gap: 56px;
  padding-bottom: 46px;
  border-bottom: 1px solid var(--line-dark);
}

.site-footer .brand__cn { color: #fff; }
.site-footer .brand__en { color: rgba(255, 255, 255, .36); }

.site-footer__slogan {
  margin-top: 22px;
  font-size: 13.5px;
  letter-spacing: .22em;
  color: rgba(255, 255, 255, .55);
}

.site-footer__note {
  margin-top: 14px;
  max-width: 30em;
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, .3);
}

.site-footer__heading {
  font-size: 11.5px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, .4);
  margin-bottom: 20px;
}

.site-footer__list { display: grid; gap: 12px; }

.site-footer__list a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, .7);
  transition: color .3s var(--ease);
}

.site-footer__list a:hover { color: var(--gold-soft); }

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 28px;
  font-size: 11.5px;
  letter-spacing: .06em;
  color: rgba(255, 255, 255, .3);
}

/* ---------- 20. Reveal ---------- */
html.js-reveal .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  will-change: opacity, transform;
}

html.js-reveal .reveal.is-in { opacity: 1; transform: none; }

.reveal[data-delay="1"] { transition-delay: .08s; }
.reveal[data-delay="2"] { transition-delay: .16s; }
.reveal[data-delay="3"] { transition-delay: .24s; }
.reveal[data-delay="4"] { transition-delay: .32s; }
.reveal[data-delay="5"] { transition-delay: .40s; }
.reveal[data-delay="6"] { transition-delay: .48s; }

/* ---------- 21. Responsive ---------- */
@media (max-width: 1080px) {
  :root { --gutter: 28px; }

  .hero--paper .hero__grid,
  .hero--warm .hero__grid { gap: 40px; }

  .scene-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .activity { grid-template-columns: 1fr; gap: 24px; }
  .activity__stage { aspect-ratio: 16 / 9; }
  .activity__list { border-top: 0; }
  .activity__item { flex: none; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 40px; }
  .site-footer__top { gap: 40px; }
}

@media (max-width: 860px) {
  :root { --header-h: 64px; --gutter: 22px; }

  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: auto;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
    padding: 12px var(--gutter) 28px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 30px 50px -30px rgba(58, 47, 36, .35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: opacity .3s var(--ease), transform .3s var(--ease),
                visibility .3s var(--ease);
  }

  .nav.is-open { opacity: 1; visibility: visible; transform: none; }

  .nav__item { height: auto; display: block; }
  .nav__link { padding: 15px 0; font-size: 15px; border-bottom: 1px solid var(--line); }
  .nav__item.is-active > .nav__link::after { display: none; }
  .nav__item.is-active > .nav__link { color: var(--gold); }

  .nav__drop {
    position: static;
    display: none;
    min-width: 0;
    padding: 4px 0 12px;
    border: 0;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__item.is-open .nav__drop { display: block; }
  .nav__drop a { padding: 10px 14px; }

  .nav-toggle { display: block; }

  /* 图片首屏：移动端改为上下结构，保证可读 */
  .hero--image {
    min-height: 0;
    align-items: flex-end;
    padding-top: calc(var(--header-h) + 120px);
    padding-bottom: 0;
  }

  .hero--image .hero__bg { background-position: 72% top; }

  .hero--image .hero__bg::after {
    background: linear-gradient(180deg,
      rgba(255, 252, 246, .2) 0%,
      rgba(255, 252, 246, .55) 34%,
      rgba(255, 252, 246, .94) 62%,
      rgba(255, 252, 246, .99) 100%);
  }

  .hero--image .hero__grid { padding-block: 120px 48px; }
  .hero--image .hero__head { max-width: none; }

  .hero--paper,
  .hero--warm { padding-top: calc(var(--header-h) + 26px); }

  .hero--paper .hero__grid,
  .hero--warm .hero__grid {
    grid-template-columns: 1fr;
    gap: 44px;
    padding-block: 36px 60px;
  }

  .lz-visual { min-height: 300px; order: -1; }
  .lz-visual img { width: 224px; }

  .section { padding-block: 66px; }
  .section__head {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 20px;
    padding-bottom: 26px;
    margin-bottom: 32px;
  }

  .grid--2, .grid--3 { grid-template-columns: 1fr; }
  .card--wide { grid-column: auto; }
  .phone-stage { min-height: 320px; order: -1; }
  .feature { grid-template-columns: 1fr; }
  .feature__body { padding: 38px 26px 42px; }

  .stats { grid-template-columns: 1fr; }
  .stat { padding: 24px 0; }
  .stat + .stat { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }

  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scene { padding: 32px 12px 30px; }
  .scene__icon { width: 52px; height: 52px; margin-bottom: 16px; }

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

  .site-footer__top { grid-template-columns: 1fr 1fr; }
  .site-footer { padding-block: 54px 30px; }
}

@media (max-width: 560px) {
  .steps { grid-template-columns: 1fr; row-gap: 30px; }
  .card { padding: 28px 20px 30px; }
  .btn { padding: 13px 22px; }
  .brand__en { display: none; }
  .qr-box { flex-direction: column; align-items: flex-start; }
  .download { flex-direction: column; align-items: flex-start; gap: 30px; }
  .download .qr { width: 124px; height: 124px; }
  .activity__name { font-size: 15px; }
  .site-footer__top { grid-template-columns: 1fr; gap: 32px; }
}

/* ---------- 22. Motion / Print ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js-reveal .reveal { opacity: 1; transform: none; transition: none; }
  .ring { animation: none; }

  * { transition-duration: .01ms !important; }
}

@media print {
  .site-header, .nav-toggle, .ring { display: none; }
  html.js-reveal .reveal { opacity: 1; transform: none; }
}