/* ============== 基础变量 ============== */
:root {
  --ink: #0e1116;
  --ink-soft: #1a1e25;
  --ink-mute: #4a4e55;
  --paper: #f5f1e8;
  --paper-soft: #faf7f0;
  --paper-dark: #ebe5d6;
  --gold: #b8956a;
  --gold-dark: #8a6e4a;
  --line: #d9d2c2;
  --line-dark: #2a2e35;
  --red-seal: #a8302a;

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Cormorant Garamond", "Noto Serif SC", serif;

  --container: 1280px;
  --gutter: 24px;
  --radius: 4px;

  --t-fast: 200ms ease;
  --t-base: 360ms cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-slow: 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* ============== 基础重置 ============== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(14, 17, 22, 0.04) 1px,
    transparent 0
  );
  background-size: 22px 22px;
  pointer-events: none;
  z-index: 0;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover {
  color: var(--gold-dark);
}
ul,
ol {
  list-style: none;
}
button {
  font: inherit;
  border: 0;
  background: transparent;
  cursor: pointer;
  color: inherit;
}
img {
  loading: lazy;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  position: relative;
  z-index: 1;
}

/* ============== 通用排版 ============== */
.section__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-dark);
  margin-bottom: 18px;
}
.section__kicker::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--gold-dark);
}
.section__title {
  font-family: var(--font-serif);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
  letter-spacing: 0.02em;
  margin-bottom: 18px;
}
.section__title em {
  font-style: normal;
  color: var(--gold-dark);
  position: relative;
  padding: 0 4px;
}
.section__title em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 6px;
  background: rgba(184, 149, 106, 0.18);
  z-index: -1;
}
.section__lead {
  font-size: 16px;
  color: var(--ink-mute);
  max-width: 720px;
  line-height: 1.85;
}
.section__head {
  margin-bottom: 60px;
}
.section__head--center {
  text-align: center;
}
.section__head--center .section__lead {
  margin: 0 auto;
}
.section__head--center .section__kicker {
  justify-content: center;
}
.section__head--center .section__kicker::before {
  display: none;
}

/* ============== 按钮 ============== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--t-base);
  cursor: pointer;
  white-space: nowrap;
  font-family: var(--font-sans);
}
.btn--primary {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn--primary:hover {
  background: var(--gold-dark);
  border-color: var(--gold-dark);
  color: var(--paper);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px -12px rgba(138, 110, 74, 0.5);
}
.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn--ghost:hover {
  background: var(--ink);
  color: var(--paper);
  transform: translateY(-2px);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gold-dark);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 4px;
  transition: gap var(--t-base);
}
.link-arrow:hover {
  gap: 12px;
  color: var(--gold-dark);
}

/* ============== 顶部通知条 ============== */
.topbar {
  background: var(--ink);
  color: var(--paper);
  font-size: 13px;
  border-bottom: 1px solid var(--line-dark);
  position: relative;
  z-index: 60;
}
.topbar__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.topbar__cta {
  font-weight: 500;
  color: var(--gold);
  letter-spacing: 0.05em;
}
.topbar__cta:hover {
  color: #e0c895;
}

/* ============== 导航 ============== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(245, 241, 232, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--t-base);
}
.nav.is-scrolled {
  background: rgba(245, 241, 232, 0.96);
  border-bottom-color: var(--line);
  box-shadow: 0 1px 0 rgba(14, 17, 22, 0.04);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
  white-space: nowrap;
  flex-shrink: 0;
}
.logo__brand { position: relative; padding-right: 10px; }
.logo__r {
  font-size: 11px;
  font-weight: 400;
  color: var(--red-seal);
  position: absolute;
  top: -4px;
  right: -4px;
  font-family: var(--font-sans);
  line-height: 1;
}
.logo__divider {
  font-weight: 300;
  color: var(--line);
  font-size: 18px;
}
.logo__sub {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.nav__menu {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
  justify-content: center;
}
.nav__menu a {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
  position: relative;
  padding: 4px 0;
  white-space: nowrap;
}
.nav__menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--gold-dark);
  transition: width var(--t-base);
}
.nav__menu a:hover {
  color: var(--gold-dark);
}
.nav__menu a:hover::after {
  width: 100%;
}
.nav__btn {
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  letter-spacing: 0.06em;
  transition: all var(--t-base);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav__btn:hover {
  background: var(--gold-dark);
  color: var(--paper);
  transform: translateY(-1px);
}
.nav__burger {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav__burger span {
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: all var(--t-base);
}
.nav__burger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__burger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__burger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: var(--ink);
  color: var(--paper);
  z-index: 40;
  padding: 100px 32px 32px;
  transition: right var(--t-base);
  overflow-y: auto;
}
.mobile-menu.is-open {
  right: 0;
}
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid var(--line-dark);
  color: var(--paper);
}
.mobile-menu a:hover {
  color: var(--gold);
  padding-left: 8px;
}

/* ============== Hero ============== */
.hero {
  position: relative;
  min-height: calc(100vh - 120px);
  padding: 80px 0 100px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(14, 17, 22, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(14, 17, 22, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    black 30%,
    transparent 75%
  );
}
.hero__seal {
  position: absolute;
  top: 6%;
  right: 4%;
  width: 200px;
  height: 200px;
  background: var(--red-seal);
  color: var(--paper);
  font-family: var(--font-serif);
  font-size: 110px;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  transform: rotate(-6deg);
  opacity: 0.92;
  box-shadow: 0 12px 30px -10px rgba(168, 48, 42, 0.4);
}
.hero__seal::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 2px solid var(--paper);
  border-radius: 3px;
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  width: 100%;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  background: rgba(14, 17, 22, 0.05);
  border: 1px solid rgba(14, 17, 22, 0.08);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-mute);
  letter-spacing: 0.06em;
  margin-bottom: 32px;
}
.hero__eyebrow .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(184, 149, 106, 0.2);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 0 4px rgba(184, 149, 106, 0.2);
  }
  50% {
    box-shadow: 0 0 0 8px rgba(184, 149, 106, 0);
  }
}
.hero__title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 8.5vw, 120px);
  font-weight: 900;
  line-height: 1.05;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin-bottom: 36px;
}
.hero__line {
  display: block;
  overflow: hidden;
}
.hero__line > span {
  display: inline-block;
  animation: rise 1s var(--t-base) both;
}
.hero__line:nth-child(1) > span {
  animation-delay: 0.1s;
}
.hero__line:nth-child(2) > span {
  animation-delay: 0.25s;
}
.hero__line:nth-child(3) {
  animation-delay: 0.4s;
}
.hero__line--small {
  font-size: clamp(20px, 2.4vw, 32px);
  font-weight: 400;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
  margin-top: 16px;
  font-family: var(--font-serif);
  font-style: italic;
}
.hero__line--small > span {
  display: inline-block;
  animation: rise 1s var(--t-base) both;
  animation-delay: 0.4s;
}
.hero__amp {
  color: var(--gold-dark);
  margin-left: 16px;
  position: relative;
}
.hero__amp::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 8%;
  height: 8px;
  background: rgba(184, 149, 106, 0.25);
  z-index: -1;
}
@keyframes rise {
  from {
    transform: translateY(110%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}
.hero__lead {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.9;
  color: var(--ink-mute);
  margin-bottom: 40px;
}
.hero__lead strong {
  color: var(--ink);
  font-weight: 600;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 60px;
}
.hero__meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
  padding-top: 28px;
  max-width: 720px;
}
.hero__meta-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-right: 20px;
  border-right: 1px solid var(--line);
}
.hero__meta-item:last-child {
  border-right: 0;
}
.hero__meta-num {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.6vw, 32px);
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.02em;
}
.hero__meta-num sup {
  font-size: 0.55em;
  color: var(--gold-dark);
  margin-left: 2px;
}
.hero__meta-lbl {
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: 0.05em;
}
.hero__scroll {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  z-index: 2;
}
.hero__scroll i {
  width: 1px;
  height: 40px;
  background: var(--ink-mute);
  position: relative;
  overflow: hidden;
}
.hero__scroll i::after {
  content: "";
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--gold-dark);
  animation: scrollLine 2s ease-in-out infinite;
}
@keyframes scrollLine {
  0% {
    top: -100%;
  }
  100% {
    top: 100%;
  }
}

/* ============== About ============== */
.about {
  padding: 120px 0;
  background: var(--paper-soft);
  position: relative;
}
.about::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--line) 20%,
    var(--line) 80%,
    transparent
  );
}
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}
.about__media {
  position: relative;
}
.about__photo {
  position: relative;
  border-radius: 200px 200px 4px 4px;
  overflow: hidden;
  background: var(--paper-dark);
  aspect-ratio: 4/5;
  box-shadow: 0 30px 60px -20px rgba(14, 17, 22, 0.2);
}
.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: contrast(1.05) saturate(0.95);
}
.about__photo figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 18px 24px;
  background: linear-gradient(to top, rgba(14, 17, 22, 0.85), transparent);
  color: var(--paper);
  font-size: 13px;
  letter-spacing: 0.1em;
}
.about__signature {
  position: absolute;
  top: 30px;
  right: -30px;
  display: flex;
  flex-direction: column;
  font-family: var(--font-en);
  font-size: 14px;
  letter-spacing: 0.18em;
  color: var(--gold-dark);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  border-right: 1px solid var(--gold);
  padding-right: 12px;
  font-weight: 600;
}
.about__signature span:last-child {
  margin-top: 14px;
  color: var(--ink);
  font-size: 12px;
}
.about__content {
  padding-top: 20px;
}
.about__lead {
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink);
  margin: 24px 0 18px;
  font-weight: 500;
}
.about__content > p {
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.about__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin: 36px 0;
}
.about__list li {
  display: flex;
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.about__list li > span {
  font-family: var(--font-en);
  font-size: 24px;
  font-weight: 600;
  color: var(--gold-dark);
  flex-shrink: 0;
  line-height: 1;
}
.about__list li strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.about__list li p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* ============== Advantages ============== */
.advantages {
  padding: 120px 0;
  background: var(--paper);
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.adv-card {
  background: var(--paper);
  padding: 44px 36px;
  position: relative;
  transition: all var(--t-base);
}
.adv-card:hover {
  background: var(--ink);
  color: var(--paper);
}
.adv-card:hover .adv-card__num {
  color: var(--gold);
}
.adv-card:hover h3 {
  color: var(--paper);
}
.adv-card:hover p {
  color: rgba(245, 241, 232, 0.7);
}
.adv-card__num {
  font-family: var(--font-en);
  font-size: 48px;
  font-weight: 500;
  color: var(--gold-dark);
  line-height: 1;
  margin-bottom: 24px;
  transition: color var(--t-base);
}
.adv-card h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  transition: color var(--t-base);
}
.adv-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-mute);
  transition: color var(--t-base);
}

/* ============== Process ============== */
.process {
  padding: 120px 0;
  background: var(--ink);
  color: var(--paper);
}
.process .section__title {
  color: var(--paper);
}
.process .section__title em {
  color: var(--gold);
}
.process .section__title em::after {
  background: rgba(184, 149, 106, 0.3);
}
.process .section__kicker {
  color: var(--gold);
}
.process .section__kicker::before {
  background: var(--gold);
}
.process .section__lead {
  color: rgba(245, 241, 232, 0.7);
}
.process__list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  position: relative;
}
.process__list::before {
  content: "";
  position: absolute;
  top: 36px;
  left: 5%;
  right: 5%;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--gold) 15%,
    var(--gold) 85%,
    transparent
  );
}
.process__list li {
  position: relative;
  padding: 0 12px;
  text-align: center;
}
.process__list li::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 50%;
  transform: translateX(-50%);
  width: 14px;
  height: 14px;
  background: var(--gold);
  border: 3px solid var(--ink);
  border-radius: 50%;
  z-index: 1;
}
.process__step {
  display: block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold);
  margin: 70px 0 16px;
}
.process__list h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 12px;
  letter-spacing: 0.04em;
}
.process__list p {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.7);
}

/* ============== Types ============== */
.types {
  padding: 120px 0;
  background: var(--paper-soft);
}
.types__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.type-card {
  display: block;
  padding: 36px 32px 32px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.type-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--gold);
  transition: width var(--t-base);
}
.type-card:hover {
  transform: translateY(-6px);
  border-color: var(--gold);
  box-shadow: 0 24px 50px -20px rgba(14, 17, 22, 0.15);
}
.type-card:hover::before {
  width: 100%;
}
.type-card__no {
  display: block;
  font-family: var(--font-en);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gold-dark);
  margin-bottom: 24px;
}
.type-card h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.type-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-mute);
  margin-bottom: 24px;
}
.type-card__more {
  display: inline-flex;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--ink);
  padding-bottom: 3px;
  transition: all var(--t-base);
}
.type-card:hover .type-card__more {
  color: var(--gold-dark);
  border-bottom-color: var(--gold-dark);
}

/* ============== Target ============== */
.target {
  padding: 120px 0;
  background: var(--paper);
}
.target__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.target-card {
  padding: 40px 36px;
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--t-base);
  position: relative;
}
.target-card:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.target-card:hover .target-card__tag {
  color: var(--gold);
}
.target-card:hover h3 {
  color: var(--paper);
}
.target-card:hover p {
  color: rgba(245, 241, 232, 0.75);
}
.target-card:hover li {
  color: rgba(245, 241, 232, 0.75);
}
.target-card--lg {
  grid-row: span 2;
  padding: 50px 44px;
}
.target-card__tag {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gold-dark);
  margin-bottom: 24px;
  transition: color var(--t-base);
}
.target-card h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 18px;
  letter-spacing: 0.04em;
  transition: color var(--t-base);
}
.target-card p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-mute);
  margin-bottom: 20px;
  transition: color var(--t-base);
}
.target-card ul li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 14px;
  color: var(--ink-mute);
  border-bottom: 1px dashed var(--line);
  transition: color var(--t-base);
}
.target-card ul li:last-child {
  border-bottom: 0;
}
.target-card ul li::before {
  content: "·";
  position: absolute;
  left: 6px;
  color: var(--gold-dark);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
}

/* ============== Cases ============== */
.cases {
  padding: 120px 0;
  background: var(--ink);
  color: var(--paper);
}
.cases .section__title {
  color: var(--paper);
}
.cases .section__title em {
  color: var(--gold);
}
.cases .section__title em::after {
  background: rgba(184, 149, 106, 0.3);
}
.cases .section__kicker {
  color: var(--gold);
}
.cases .section__kicker::before {
  background: var(--gold);
}
.cases .section__lead {
  color: rgba(245, 241, 232, 0.7);
}
.cases__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.case-item {
  background: var(--ink);
  padding: 50px 24px;
  text-align: center;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
  cursor: default;
}
.case-item::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at center,
    rgba(184, 149, 106, 0.15),
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--t-base);
}
.case-item:hover {
  background: var(--ink-soft);
}
.case-item:hover::before {
  opacity: 1;
}
.case-item:hover em {
  color: var(--gold);
  transform: scale(1.05);
}
.case-item span {
  display: block;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 8px;
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}
.case-item em {
  display: block;
  font-style: normal;
  font-size: 13px;
  color: rgba(245, 241, 232, 0.6);
  letter-spacing: 0.06em;
  transition: all var(--t-base);
  position: relative;
  z-index: 1;
}

/* ============== FAQ ============== */
.faq {
  padding: 120px 0;
  background: var(--paper-soft);
}
.faq__container {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 80px;
  align-items: start;
}
.faq__head {
  position: sticky;
  top: 120px;
}
.faq__head .btn {
  margin-top: 20px;
}
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--t-base);
  overflow: hidden;
}
.faq-item[open] {
  border-color: var(--gold);
  box-shadow: 0 12px 28px -16px rgba(14, 17, 22, 0.12);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
  transition: color var(--t-base);
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  color: var(--gold-dark);
}
.faq-item__i {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  position: relative;
  transition: transform var(--t-base);
}
.faq-item__i::before,
.faq-item__i::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--gold-dark);
  transition: all var(--t-base);
}
.faq-item__i::before {
  width: 14px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}
.faq-item__i::after {
  width: 1.5px;
  height: 14px;
  transform: translate(-50%, -50%);
}
.faq-item[open] .faq-item__i::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}
.faq-item__a {
  padding: 0 28px 24px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-mute);
  animation: fadeUp 0.5s var(--t-base);
}
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============== Contact ============== */
.contact {
  padding: 120px 0;
  background: var(--paper);
}
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 28px;
}
.contact-card {
  background: var(--paper-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 44px 32px;
  text-align: center;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.contact-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 24px 50px -20px rgba(14, 17, 22, 0.12);
}
.contact-card:hover::before {
  transform: scaleX(1);
}
.contact-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: var(--ink);
  color: var(--gold);
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-family: var(--font-serif);
}
.contact-card h3 {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.contact-card > p {
  font-size: 13px;
  color: var(--ink-mute);
  margin-bottom: 20px;
}
.contact-card__big {
  display: block;
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
  margin-bottom: 8px;
  word-break: break-all;
}
.contact-card__big:hover {
  color: var(--gold-dark);
}
.contact-card__hint {
  display: block;
  font-size: 13px;
  color: var(--ink-mute);
  letter-spacing: 0.04em;
}
.contact-card--qr .contact-card__qr {
  width: 180px;
  height: 180px;
  margin: 0 auto 20px;
  padding: 8px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.contact-card--qr img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

/* ============== Services ============== */
.services {
  padding: 120px 0 100px;
  background: var(--paper-soft);
}
.services__list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.services__list li {
  background: var(--paper);
  transition: all var(--t-base);
}
.services__list a {
  display: block;
  padding: 18px 12px;
  font-size: 13px;
  color: var(--ink);
  text-align: center;
  letter-spacing: 0.04em;
  transition: all var(--t-base);
  font-weight: 500;
}
.services__list a:hover {
  background: var(--ink);
  color: var(--paper);
}

/* ============== Footer ============== */
.footer {
  background: var(--ink);
  color: var(--paper);
  position: relative;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 60px;
  padding: 80px var(--gutter) 60px;
}
.footer__brand p {
  font-size: 13px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.6);
  margin-top: 18px;
  max-width: 360px;
}
.footer__logo {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.04em;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.footer__logo sup {
  font-size: 12px;
  color: var(--red-seal);
  font-weight: 400;
  font-family: var(--font-sans);
}
.footer__logo span {
  color: rgba(245, 241, 232, 0.4);
  font-weight: 300;
}
.footer__col h4 {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 18px;
  letter-spacing: 0.08em;
}
.footer__col a,
.footer__col p {
  display: block;
  font-size: 13px;
  color: rgba(245, 241, 232, 0.6);
  margin-bottom: 10px;
  line-height: 1.7;
  transition: color var(--t-fast);
}
.footer__col a:hover {
  color: var(--gold);
}
.footer__bottom {
  border-top: 1px solid var(--line-dark);
  padding: 24px 0;
  font-size: 13px;
  color: rgba(245, 241, 232, 0.5);
}
.footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer__bottom a {
  color: rgba(245, 241, 232, 0.7);
}
.footer__bottom a:hover {
  color: var(--gold);
}

/* ============== 悬浮联系 ============== */
.float-contact {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.float-contact__item {
  width: 56px;
  height: 56px;
  background: var(--ink);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 20px;
  transition: all var(--t-base);
  box-shadow: 0 8px 20px -8px rgba(14, 17, 22, 0.3);
  position: relative;
  border: 0;
  cursor: pointer;
}
.float-contact__item em {
  font-style: normal;
  font-size: 10px;
  font-family: var(--font-sans);
  margin-top: 2px;
  letter-spacing: 0.05em;
  opacity: 0.7;
}
.float-contact__item:hover {
  background: var(--gold-dark);
  transform: scale(1.08);
  color: var(--paper);
}
.float-contact__top {
  opacity: 0;
  pointer-events: none;
  transform: translateY(20px);
}
.float-contact__top.is-show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ============== 滚动渐显 ============== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.8s var(--t-base),
    transform 0.8s var(--t-base);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}

/* ============== 响应式 ============== */
@media (max-width: 1280px) {
  .nav__btn { display: none; }
}
@media (max-width: 1100px) {
  .nav__menu { display: none; }
  .nav__burger { display: flex; }
  .mobile-menu { display: block; }
}
@media (max-width: 1024px) {
  .about__inner { grid-template-columns: 1fr; gap: 60px; }
  .about__signature { right: 20px; top: 20px; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .process__list { grid-template-columns: repeat(3, 1fr); gap: 40px 0; }
  .process__list::before { display: none; }
  .types__grid { grid-template-columns: repeat(2, 1fr); }
  .target__grid { grid-template-columns: 1fr; }
  .target-card--lg { grid-row: auto; }
  .cases__grid { grid-template-columns: repeat(2, 1fr); }
  .faq__container { grid-template-columns: 1fr; gap: 40px; }
  .faq__head { position: static; }
  .services__list { grid-template-columns: repeat(4, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 40px; }
  .hero__meta { grid-template-columns: repeat(2, 1fr); gap: 16px 0; }
  .hero__meta-item:nth-child(2) { border-right: 0; }
}

@media (max-width: 640px) {
  .topbar__inner {
    font-size: 12px;
    padding: 6px 16px;
  }
  .topbar__inner > span {
    display: none;
  }
  .nav__inner {
    padding: 14px 16px;
  }
  .logo__sub {
    display: none;
  }
  .logo__divider {
    display: none;
  }
  .nav__logo {
    font-size: 18px;
  }
  .hero {
    padding: 60px 0 80px;
    min-height: auto;
  }
  .hero__seal {
    width: 120px;
    height: 120px;
    font-size: 60px;
    top: 4%;
    right: 4%;
  }
  .hero__title {
    font-size: clamp(40px, 14vw, 72px);
    margin-bottom: 24px;
  }
  .hero__amp {
    margin-left: 8px;
  }
  .hero__lead {
    font-size: 15px;
  }
  .hero__meta {
    grid-template-columns: 1fr 1fr;
  }
  .hero__meta-item {
    border-right: 0;
    padding: 8px 0;
    border-bottom: 1px solid var(--line);
  }
  .hero__meta-item:nth-child(odd) {
    border-right: 1px solid var(--line);
  }
  .hero__meta-item:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
  .about,
  .advantages,
  .process,
  .types,
  .target,
  .cases,
  .faq,
  .contact,
  .services {
    padding: 80px 0;
  }
  .about__list {
    grid-template-columns: 1fr;
  }
  .adv-grid {
    grid-template-columns: 1fr;
  }
  .process__list {
    grid-template-columns: 1fr;
  }
  .types__grid {
    grid-template-columns: 1fr;
  }
  .cases__grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact__grid {
    grid-template-columns: 1fr;
  }
  .services__list {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 60px 16px 40px;
  }
  .footer__bottom-inner {
    justify-content: center;
    text-align: center;
    flex-direction: column;
  }
  .section__head {
    margin-bottom: 40px;
  }
  .float-contact {
    right: 12px;
    bottom: 12px;
  }
  .float-contact__item {
    width: 48px;
    height: 48px;
    font-size: 18px;
  }
  .hero__scroll {
    display: none;
  }
  .about__signature {
    display: none;
  }
  .container {
    padding: 0 16px;
  }
  .topbar {
    font-size: 11px;
  }
}

/* ============== 减弱动效 ============== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}