/* ===========================================================
   闫宝龙法语网站建设  -  styles.css
   设计语言：法式优雅 × 极简商务  -  主色 午夜蓝 / 暖金 / 法兰红
   =========================================================== */

:root {
  /* 基础色板 */
  --ink-900: #0a1929;
  --ink-800: #102236;
  --ink-700: #1a2942;
  --ink-600: #2a3a55;
  --ink-500: #4a5568;
  --ink-400: #6b7280;
  --ink-300: #9ca3af;
  --ink-200: #d1d5db;
  --ink-100: #e5e7eb;
  --ink-50: #f3f4f6;

  --paper: #faf8f3; /* 暖米白 */
  --paper-2: #f5f1e8; /* 米色 */
  --white: #ffffff;

  --gold-700: #b08a3e;
  --gold-600: #c69a4d;
  --gold-500: #d4af37; /* 暖金主色 */
  --gold-400: #e3c772;
  --gold-200: #f0deb0;

  --french-red: #c8102e; /* 法兰红 */
  --french-blue: #0055a4; /* 法兰蓝 */
  --success: #1a7f4f;

  /* 字体 */
  --font-display:
    "Playfair Display", "Cormorant Garamond", "Songti SC", "STSong", serif;
  --font-serif: "Cormorant Garamond", "Playfair Display", "Songti SC", serif;
  --font-sans:
    "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui,
    -apple-system, sans-serif;

  /* 节奏 */
  --r-1: 4px;
  --r-2: 8px;
  --r-3: 12px;
  --r-4: 16px;
  --r-5: 24px;
  --r-6: 32px;
  --r-7: 48px;
  --r-8: 64px;
  --r-9: 96px;

  --max: 1280px;
  --shadow-1:
    0 1px 2px rgba(10, 25, 41, 0.04), 0 4px 12px rgba(10, 25, 41, 0.04);
  --shadow-2:
    0 8px 24px rgba(10, 25, 41, 0.08), 0 2px 6px rgba(10, 25, 41, 0.04);
  --shadow-3: 0 24px 64px rgba(10, 25, 41, 0.16);
  --t: cubic-bezier(0.2, 0.7, 0.2, 1);
}

/* 基础重置 */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink-800);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--t);
}
button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
  color: inherit;
}
sup {
  font-size: 0.55em;
  vertical-align: super;
}

/* 通用容器 */
.section {
  padding: clamp(72px, 9vw, 128px) 0;
  position: relative;
}
.section--alt {
  background: var(--ink-900);
  color: var(--paper);
}
.section--alt .section__title {
  color: var(--paper);
}
.section--alt .section__title em {
  color: var(--gold-400);
  font-style: normal;
}
.section--alt .section__lede {
  color: rgba(245, 241, 232, 0.78);
}
.section--alt .section__eyebrow {
  color: var(--gold-400);
}
.section--contact {
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

.section__inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

.section__head {
  max-width: 760px;
  margin: 0 0 56px;
}
.section__head--center {
  margin: 0 auto 64px;
  text-align: center;
}
.section__eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.26em;
  color: var(--gold-700);
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  position: relative;
  padding-left: 36px;
}
.section__eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 28px;
  height: 1px;
  background: var(--gold-500);
}
.section__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 4.4vw, 56px);
  font-weight: 500;
  line-height: 1.15;
  color: var(--ink-900);
  margin: 0 0 24px;
  letter-spacing: -0.01em;
}
.section__title em {
  font-style: italic;
  color: var(--french-red);
  position: relative;
}
.section__title--left {
  text-align: left;
}
.section__lede {
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink-500);
  max-width: 720px;
  margin: 0;
}
.section__head--center .section__lede {
  margin: 0 auto;
}

/* ===========================================================
   顶部条
   =========================================================== */
.topbar {
  background: var(--ink-900);
  color: rgba(245, 241, 232, 0.7);
  font-size: 12.5px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.18);
}
.topbar__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 9px clamp(20px, 4vw, 48px);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.topbar__item {
  display: inline-flex;
  align-items: center;
}
.topbar__item:hover {
  color: var(--gold-400);
}
.topbar__divider {
  width: 1px;
  height: 12px;
  background: rgba(212, 175, 55, 0.3);
}

/* ===========================================================
   头部导航
   =========================================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: all 0.35s var(--t);
}
.header.is-scrolled {
  background: rgba(255, 255, 255, 0.98);
  border-bottom-color: var(--ink-100);
  box-shadow: var(--shadow-1);
}
.header__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px clamp(20px, 4vw, 48px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* 品牌 */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: 0.01em;
}
.brand__name {
  font-size: 22px;
  position: relative;
}
.brand__r {
  color: var(--french-red);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.55em;
  margin-left: 3px;
  vertical-align: super;
  line-height: 0;
  display: inline-block;
  position: relative;
  top: -0.35em;
}
.brand__sep {
  color: var(--gold-500);
  font-size: 22px;
  font-weight: 300;
}
.brand__sub {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-500);
  letter-spacing: 0.03em;
  padding-left: 10px;
  border-left: 1px solid var(--ink-100);
  margin-left: 2px;
  white-space: nowrap;
}
.brand--light {
  color: var(--paper);
}
.brand--light .brand__sub {
  color: rgba(245, 241, 232, 0.6);
  border-left-color: rgba(212, 175, 55, 0.3);
}

/* 导航 */
.nav {
  display: flex;
  align-items: center;
  gap: 0;
}
.nav__link {
  position: relative;
  display: inline-block;
  padding: 10px 11px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-700);
  border-radius: 6px;
  white-space: nowrap;
  transition:
    color 0.25s var(--t),
    background 0.25s var(--t);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 1.5px;
  background: var(--gold-500);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--t);
}
.nav__link:hover {
  color: var(--ink-900);
}
.nav__link:hover::after {
  transform: scaleX(1);
}
.nav__link--cta {
  background: var(--ink-900);
  color: var(--paper);
  padding: 9px 18px;
  border-radius: 999px;
  margin-left: 8px;
  font-size: 13.5px;
}
.nav__link--cta::after {
  display: none;
}
.nav__link--cta:hover {
  background: var(--gold-500);
  color: var(--ink-900);
}

/* 移动端按钮 */
.nav-toggle {
  display: none;
}

/* ===========================================================
   Hero
   =========================================================== */
.hero {
  position: relative;
  min-height: clamp(640px, 88vh, 820px);
  background: var(--ink-900);
  color: var(--paper);
  overflow: hidden;
  display: flex;
  align-items: center;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(
      1200px 700px at 80% -10%,
      rgba(212, 175, 55, 0.18),
      transparent 60%
    ),
    radial-gradient(
      900px 600px at -10% 110%,
      rgba(0, 85, 164, 0.35),
      transparent 60%
    ),
    linear-gradient(180deg, #0a1929 0%, #102236 50%, #0a1929 100%);
}
.hero__mesh {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(212, 175, 55, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(212, 175, 55, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(
    ellipse at center,
    #000 30%,
    transparent 80%
  );
}
.hero__lines {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero__lines span {
  position: absolute;
  width: 1px;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent,
    rgba(212, 175, 55, 0.2) 30%,
    rgba(212, 175, 55, 0.2) 70%,
    transparent
  );
  animation: lineFloat 9s ease-in-out infinite;
}
.hero__lines span:nth-child(1) {
  left: 12%;
  animation-delay: -1s;
}
.hero__lines span:nth-child(2) {
  left: 28%;
  animation-delay: -3s;
}
.hero__lines span:nth-child(3) {
  left: 46%;
  animation-delay: -5s;
}
.hero__lines span:nth-child(4) {
  left: 64%;
  animation-delay: -2s;
}
.hero__lines span:nth-child(5) {
  left: 82%;
  animation-delay: -7s;
}
@keyframes lineFloat {
  0%,
  100% {
    opacity: 0.15;
    transform: translateY(0);
  }
  50% {
    opacity: 0.55;
    transform: translateY(-12px);
  }
}

.hero__flag {
  position: absolute;
  top: 50%;
  right: -120px;
  transform: translateY(-50%) rotate(-12deg);
  width: 360px;
  height: 360px;
  display: flex;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 120px rgba(212, 175, 55, 0.15);
  opacity: 0.14;
  filter: blur(0.4px);
  animation: flagSpin 80s linear infinite;
}
.hero__flag-stripe {
  flex: 1;
}
.hero__flag-stripe--blue {
  background: var(--french-blue);
}
.hero__flag-stripe--white {
  background: #fff;
}
.hero__flag-stripe--red {
  background: var(--french-red);
}
@keyframes flagSpin {
  to {
    transform: translateY(-50%) rotate(348deg);
  }
}

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(80px, 12vw, 160px) clamp(20px, 4vw, 48px)
    clamp(80px, 10vw, 120px);
  width: 100%;
}
.hero__eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 0.36em;
  color: var(--gold-400);
  font-weight: 500;
  margin-bottom: 32px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(212, 175, 55, 0.4);
  position: relative;
  padding-left: 38px;
}
.hero__eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 28px;
  height: 1px;
  background: var(--gold-500);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(40px, 6.4vw, 88px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 28px;
  color: var(--paper);
}
.hero__title-line {
  display: block;
}
.hero__title-line--accent {
  font-style: italic;
  color: var(--gold-400);
  font-weight: 400;
  font-size: clamp(20px, 2.6vw, 36px);
  margin-top: 16px;
  letter-spacing: 0.005em;
}

.hero__desc {
  max-width: 720px;
  font-size: clamp(15px, 1.3vw, 18px);
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.78);
  margin: 0 0 48px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 30px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: all 0.35s var(--t);
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--gold-500);
  color: var(--ink-900);
  box-shadow: 0 6px 24px rgba(212, 175, 55, 0.35);
}
.btn--primary:hover {
  background: var(--gold-400);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(212, 175, 55, 0.45);
}
.btn--ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(245, 241, 232, 0.3);
}
.btn--ghost:hover {
  background: rgba(245, 241, 232, 0.06);
  border-color: var(--gold-400);
  color: var(--gold-400);
}
.btn--outline {
  background: transparent;
  color: var(--ink-900);
  border-color: var(--ink-200);
}
.btn--outline:hover {
  background: var(--ink-900);
  color: var(--paper);
  border-color: var(--ink-900);
}
.btn--full {
  width: 100%;
  padding: 16px;
}

.hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  padding-top: 36px;
}
.hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}
.hero__stat-num {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.4vw, 44px);
  font-weight: 500;
  color: var(--gold-400);
  line-height: 1;
  letter-spacing: -0.01em;
}
.hero__stat-num small {
  font-size: 0.5em;
  font-weight: 400;
}
.hero__stat-label {
  font-size: 13px;
  color: rgba(245, 241, 232, 0.6);
  letter-spacing: 0.04em;
}

.hero__scroll {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 40px;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
  z-index: 3;
}
.hero__scroll span {
  display: block;
  width: 2px;
  height: 8px;
  background: var(--gold-400);
  border-radius: 2px;
  animation: scrollDot 1.6s ease-in-out infinite;
}
@keyframes scrollDot {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(14px);
    opacity: 0;
  }
}

/* ===========================================================
   服务卡片
   =========================================================== */
.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-5);
  padding: 36px 32px 32px;
  transition: all 0.4s var(--t);
  overflow: hidden;
  isolation: isolate;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-500), var(--french-red));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--t);
}
.service-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px 200px at 50% 0%,
    rgba(212, 175, 55, 0.08),
    transparent 70%
  );
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s var(--t);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-3);
  border-color: transparent;
}
.service-card:hover::before {
  transform: scaleX(1);
}
.service-card:hover::after {
  opacity: 1;
}

.service-card__num {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 500;
  color: var(--gold-500);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
}
.service-card__title {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  color: var(--ink-900);
  margin: 0 0 14px;
  letter-spacing: -0.005em;
}
.service-card__desc {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-500);
  margin: 0 0 22px;
}
.service-card__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ink-100);
  padding-top: 18px;
}
.service-card__list li {
  font-size: 13.5px;
  color: var(--ink-700);
  padding: 6px 0 6px 20px;
  position: relative;
}
.service-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 10px;
  height: 1.5px;
  background: var(--gold-500);
}

/* ===========================================================
   核心优势
   =========================================================== */
.advantages {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(212, 175, 55, 0.18);
  border: 1px solid rgba(212, 175, 55, 0.18);
  border-radius: var(--r-5);
  overflow: hidden;
}
.advantage {
  background: var(--ink-800);
  padding: 40px 32px;
  transition: background 0.35s var(--t);
  position: relative;
}
.advantage:hover {
  background: var(--ink-700);
}
.advantage__icon {
  width: 56px;
  height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-400);
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: 50%;
  margin-bottom: 22px;
  transition: all 0.35s var(--t);
}
.advantage:hover .advantage__icon {
  background: var(--gold-500);
  color: var(--ink-900);
  border-color: var(--gold-500);
  transform: rotate(-8deg);
}
.advantage__icon svg {
  width: 26px;
  height: 26px;
}
.advantage h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  color: var(--paper);
  margin: 0 0 12px;
  letter-spacing: -0.005em;
}
.advantage p {
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 241, 232, 0.65);
  margin: 0;
}

/* ===========================================================
   建站流程
   =========================================================== */
.process {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  position: relative;
}
.process::before {
  content: "";
  position: absolute;
  top: 60px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: repeating-linear-gradient(
    90deg,
    var(--gold-500) 0 8px,
    transparent 8px 16px
  );
  z-index: 0;
}
.process__step {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 8px;
}
.process__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--gold-500);
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 22px;
  position: relative;
  transition: all 0.35s var(--t);
}
.process__step:hover .process__num {
  background: var(--ink-900);
  color: var(--gold-400);
  transform: scale(1.08);
}
.process__step h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--ink-900);
  margin: 0 0 10px;
}
.process__step p {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-500);
  margin: 0;
}

/* ===========================================================
   案例展示
   =========================================================== */
.cases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case {
  background: var(--ink-700);
  border-radius: var(--r-5);
  overflow: hidden;
  transition: all 0.4s var(--t);
}
.case:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-3);
}
.case__cover {
  position: relative;
  height: 200px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 20px;
  overflow: hidden;
  background: var(--ink-700);
}
.case__cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at 80% 20%,
    rgba(212, 175, 55, 0.18),
    transparent 60%
  );
}
.case__icon {
  position: absolute;
  right: 20px;
  top: 20px;
  font-size: 56px;
  opacity: 0.5;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
}
.case__tag {
  position: relative;
  display: inline-block;
  padding: 5px 12px;
  background: rgba(212, 175, 55, 0.95);
  color: var(--ink-900);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.05em;
  border-radius: 999px;
}
.case__body {
  padding: 24px 24px 26px;
}
.case__body h3 {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  color: var(--paper);
  margin: 0 0 12px;
}
.case__body p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(245, 241, 232, 0.7);
  margin: 0 0 16px;
}
.case__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  border-top: 1px solid rgba(212, 175, 55, 0.18);
  padding-top: 14px;
}
.case__meta span {
  font-size: 12.5px;
  color: var(--gold-400);
  position: relative;
  padding-left: 14px;
}
.case__meta span::before {
  content: "→";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--gold-500);
}

/* ===========================================================
   关于闫宝龙
   =========================================================== */
.about {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 80px;
  align-items: start;
}
.about__media {
  position: relative;
  padding-top: 32px;
  padding-left: 32px;
}
.about__photo {
  position: relative;
  border-radius: var(--r-5);
  overflow: hidden;
  box-shadow: var(--shadow-3);
  background: var(--ink-100);
  aspect-ratio: 4/5;
}
.about__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--t);
}
.about__photo:hover img {
  transform: scale(1.04);
}
.about__photo-decor {
  position: absolute;
  top: -32px;
  left: -32px;
  width: 220px;
  height: 220px;
  border: 1.5px solid var(--gold-500);
  border-radius: var(--r-5);
  z-index: -1;
}
.about__photo-decor span {
  position: absolute;
  bottom: -8px;
  right: -8px;
  background: var(--ink-900);
  color: var(--gold-400);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  padding: 8px 16px;
  border-radius: var(--r-2);
  letter-spacing: 0.1em;
}
.about__signature {
  position: absolute;
  right: -40px;
  bottom: -20px;
  color: var(--gold-500);
  width: 180px;
  opacity: 0.8;
  z-index: 2;
  transform: rotate(-6deg);
}

.about__content {
  padding-top: 16px;
}
.about__lede {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ink-500);
  margin: 0 0 36px;
  padding-left: 18px;
  border-left: 2px solid var(--gold-500);
}
.about__list {
  list-style: none;
  margin: 0 0 36px;
  padding: 0;
  display: grid;
  gap: 24px;
}
.about__list li {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 20px;
  align-items: start;
  padding-bottom: 24px;
  border-bottom: 1px dashed var(--ink-100);
}
.about__list li:last-child {
  border-bottom: 0;
}
.about__list-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 500;
  color: var(--gold-500);
  line-height: 1;
  letter-spacing: -0.01em;
}
.about__list strong {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
  margin-bottom: 6px;
}
.about__list p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink-500);
  margin: 0;
}

/* ===========================================================
   FAQ
   =========================================================== */
.faq {
  max-width: 920px;
  margin: 0 auto;
  display: grid;
  gap: 12px;
}
.faq__item {
  background: var(--ink-800);
  border: 1px solid rgba(212, 175, 55, 0.18);
  border-radius: var(--r-4);
  overflow: hidden;
  transition: all 0.35s var(--t);
}
.faq__item[open] {
  background: var(--ink-700);
  border-color: var(--gold-500);
}
.faq__item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 64px 22px 28px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--paper);
  position: relative;
  display: block;
  letter-spacing: -0.005em;
}
.faq__item summary::-webkit-details-marker {
  display: none;
}
.faq__icon {
  position: absolute;
  right: 24px;
  top: 50%;
  width: 28px;
  height: 28px;
  transform: translateY(-50%);
  transition: all 0.35s var(--t);
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--gold-400);
  transform: translate(-50%, -50%);
  transition: all 0.35s var(--t);
}
.faq__icon::before {
  width: 14px;
  height: 1.5px;
}
.faq__icon::after {
  width: 1.5px;
  height: 14px;
}
.faq__item[open] .faq__icon {
  transform: translateY(-50%) rotate(180deg);
}
.faq__item[open] .faq__icon::after {
  opacity: 0;
}
.faq__body {
  padding: 0 28px 24px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.78);
}
.faq__body p {
  margin: 0;
}

/* ===========================================================
   联系方式
   =========================================================== */
.contact {
  display: grid;
  grid-template-columns: 1fr 1.1fr auto;
  gap: 48px;
  background: var(--white);
  border-radius: var(--r-6);
  padding: 56px;
  box-shadow: var(--shadow-2);
  align-items: start;
}
.contact__lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-500);
  margin: 0 0 36px;
}
.contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.contact__list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  background: var(--paper-2);
  border-radius: var(--r-3);
  border-left: 3px solid var(--gold-500);
}
.contact__label {
  font-size: 12.5px;
  letter-spacing: 0.12em;
  color: var(--ink-400);
  text-transform: uppercase;
  font-weight: 500;
}
.contact__value {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: -0.005em;
}
a.contact__value:hover {
  color: var(--french-red);
}

.contact__form {
  display: grid;
  gap: 16px;
  background: var(--paper);
  padding: 32px;
  border-radius: var(--r-4);
  border: 1px solid var(--ink-100);
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.contact__form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--ink-500);
  font-weight: 500;
}
.contact__form label span i {
  color: var(--french-red);
  font-style: normal;
  margin-left: 2px;
}
.contact__form input,
.contact__form select,
.contact__form textarea {
  width: 100%;
  padding: 12px 14px;
  font: inherit;
  font-size: 14.5px;
  color: var(--ink-800);
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-2);
  transition: all 0.25s var(--t);
  font-family: inherit;
}
.contact__form textarea {
  resize: vertical;
  min-height: 100px;
}
.contact__form input:focus,
.contact__form select:focus,
.contact__form textarea:focus {
  outline: none;
  border-color: var(--gold-500);
  box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.12);
}
.form__full {
  grid-column: 1 / -1;
}
.form__tip {
  font-size: 12.5px;
  color: var(--ink-400);
  margin: 0;
  text-align: center;
}
.form__tip.is-success {
  color: var(--success);
}
.form__tip.is-error {
  color: var(--french-red);
}

.contact__qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 18px;
  background: var(--ink-900);
  color: var(--paper);
  border-radius: var(--r-4);
  text-align: center;
}
.contact__qr img {
  width: 160px;
  height: 160px;
  border-radius: var(--r-2);
  background: var(--white);
  padding: 8px;
}
.contact__qr span {
  font-size: 13px;
  color: rgba(245, 241, 232, 0.85);
  letter-spacing: 0.04em;
}

/* ===========================================================
   更多服务
   =========================================================== */
.more {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}
.more__item {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 18px 12px;
  background: var(--white);
  border: 1px solid var(--ink-100);
  border-radius: var(--r-3);
  font-size: 14px;
  color: var(--ink-700);
  font-weight: 500;
  transition: all 0.3s var(--t);
  min-height: 64px;
}
.more__item:hover {
  background: var(--ink-900);
  color: var(--paper);
  border-color: var(--ink-900);
  transform: translateY(-3px);
  box-shadow: var(--shadow-2);
}
.more__item:hover::after {
  color: var(--gold-400);
}

/* ===========================================================
   底部
   =========================================================== */
.footer {
  background: var(--ink-900);
  color: rgba(245, 241, 232, 0.7);
  padding: 72px 0 24px;
  border-top: 1px solid rgba(212, 175, 55, 0.2);
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-500), transparent);
}
.footer__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}
.footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 56px;
  margin-bottom: 56px;
}
.footer__brand p {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.55);
}
.footer__col h4 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
  margin: 0 0 18px;
  letter-spacing: -0.005em;
}
.footer__col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer__col li {
  font-size: 13.5px;
  padding: 5px 0;
  line-height: 1.6;
}
.footer__col a:hover {
  color: var(--gold-400);
}
.footer__langs {
  columns: 2;
  column-gap: 20px;
}
.footer__langs li {
  break-inside: avoid;
}
.footer__bottom {
  border-top: 1px solid rgba(245, 241, 232, 0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 12.5px;
  color: rgba(245, 241, 232, 0.45);
  line-height: 2;
}
.footer__bottom a:hover { color: var(--gold-400); }

.beian-link { display: inline-flex; align-items: center; white-space: nowrap; }
.beian-icon {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 4px;
  flex-shrink: 0;
  color: rgba(245, 241, 232, 0.55);
}

/* ===========================================================
   回到顶部
   =========================================================== */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 48px;
  height: 48px;
  background: var(--ink-900);
  color: var(--gold-400);
  border: 1px solid var(--gold-500);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  z-index: 70;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.35s var(--t);
  box-shadow: var(--shadow-2);
}
.back-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-top:hover {
  background: var(--gold-500);
  color: var(--ink-900);
}

/* ===========================================================
   滚动动画
   =========================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.8s var(--t),
    transform 0.8s var(--t);
}
.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] {
  transition-delay: 0.08s;
}
.reveal[data-delay="2"] {
  transition-delay: 0.16s;
}
.reveal[data-delay="3"] {
  transition-delay: 0.24s;
}
.reveal[data-delay="4"] {
  transition-delay: 0.32s;
}
.reveal[data-delay="5"] {
  transition-delay: 0.4s;
}
.reveal[data-delay="6"] {
  transition-delay: 0.48s;
}

/* ===========================================================
   响应式
   =========================================================== */
@media (max-width: 1024px) {
  .services,
  .advantages,
  .cases {
    grid-template-columns: repeat(2, 1fr);
  }
  .more {
    grid-template-columns: repeat(4, 1fr);
  }
  .process {
    grid-template-columns: repeat(3, 1fr);
    row-gap: 40px;
  }
  .process::before {
    display: none;
  }
  .about {
    grid-template-columns: 1fr;
    gap: 56px;
  }
  .about__media {
    max-width: 480px;
    margin: 0 auto;
  }
  .contact {
    grid-template-columns: 1fr 1fr;
  }
  .contact__qr {
    grid-column: 1 / -1;
    flex-direction: row;
    justify-content: center;
    gap: 18px;
  }
  .footer__main {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .topbar {
    display: none;
  }
  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(320px, 80vw);
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 88px 24px 32px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.4s var(--t);
    box-shadow: -16px 0 40px rgba(10, 25, 41, 0.18);
    z-index: 90;
  }
  .nav.is-open {
    transform: translateX(0);
  }
  .nav__link {
    padding: 14px 16px;
    font-size: 16px;
    color: var(--ink-800);
    border-radius: 8px;
  }
  .nav__link:hover {
    background: var(--paper-2);
  }
  .nav__link--cta {
    margin: 16px 0 0;
    text-align: center;
  }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--paper-2);
    z-index: 100;
    position: relative;
  }
  .nav-toggle span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--ink-800);
    margin: 0 auto;
    transition: all 0.3s var(--t);
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .services,
  .advantages,
  .cases {
    grid-template-columns: 1fr;
  }
  .process {
    grid-template-columns: repeat(2, 1fr);
  }
  .more {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact {
    grid-template-columns: 1fr;
    padding: 32px 24px;
    gap: 32px;
  }
  .contact__form {
    padding: 20px;
  }
  .form__row {
    grid-template-columns: 1fr;
  }
  .contact__qr {
    flex-direction: column;
  }
  .footer__main {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer__langs {
    columns: 2;
  }
  .about__list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .about__photo-decor {
    width: 140px;
    height: 140px;
    top: -16px;
    left: -16px;
  }
  .about__photo-decor span {
    font-size: 16px;
    padding: 6px 10px;
  }
  .about__signature {
    right: 0;
    bottom: 0;
    width: 120px;
  }
  .back-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .brand__name {
    font-size: 20px;
  }
  .brand__sub {
    font-size: 12.5px;
    padding-left: 8px;
  }
  .hero__title {
    font-size: 38px;
  }
  .hero__actions .btn {
    width: 100%;
  }
  .hero__stats {
    grid-template-columns: 1fr 1fr;
  }
  .process {
    grid-template-columns: 1fr;
  }
  .more {
    grid-template-columns: 1fr 1fr;
  }
}

/* 移动端菜单背景遮罩 */
body.menu-open::before {
  content: "";
  position: fixed;
  inset: 0;
  background: rgba(10, 25, 41, 0.5);
  z-index: 85;
  animation: fadeIn 0.3s var(--t);
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* 字体加载占位 */
.fonts-loading body {
  visibility: hidden;
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}