/* ============================================
   闫宝龙 Yanbaolong.com — 全域网络营销
   设计系统：深空蓝 + 琥珀金 · 编辑型版面
   ============================================ */

:root {
  /* 颜色 */
  --c-bg: #F7F8FA;
  --c-bg-2: #FFFFFF;
  --c-ink: #0B1B2B;
  --c-ink-2: #1A2C44;
  --c-text: #2A3848;
  --c-text-soft: #5A6A7C;
  --c-line: #E3E6EB;
  --c-line-2: #D8DDE4;
  --c-gold: #D4A85A;
  --c-gold-2: #E5C176;
  --c-gold-soft: #F5E9CF;
  --c-deep: #0B1B2B;
  --c-deep-2: #102337;
  --c-mist: rgba(255, 255, 255, 0.08);
  --c-mist-2: rgba(255, 255, 255, 0.14);

  /* 字体 */
  --ff-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --ff-sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --ff-en: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;

  /* 圆角 / 阴影 / 过渡 */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --r-xl: 22px;
  --shadow-1: 0 1px 2px rgba(11, 27, 43, 0.04), 0 4px 14px rgba(11, 27, 43, 0.05);
  --shadow-2: 0 4px 8px rgba(11, 27, 43, 0.06), 0 18px 38px rgba(11, 27, 43, 0.09);
  --shadow-3: 0 10px 24px rgba(11, 27, 43, 0.08), 0 30px 80px rgba(11, 27, 43, 0.16);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 0.5s;
}

/* ========== 重置 ========== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--ff-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  overflow-x: hidden;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }

/* ========== 容器 ========== */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
}

/* ========== 顶部导航 ========== */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(11, 27, 43, 0.78);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.topbar.is-light {
  background: rgba(255, 255, 255, 0.86);
  border-bottom-color: var(--c-line);
  box-shadow: 0 2px 12px rgba(11, 27, 43, 0.04);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: #fff;
  font-family: var(--ff-serif);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: color 0.3s var(--ease);
}
.topbar.is-light .brand { color: var(--c-ink); }
.brand__name {
  font-size: 22px;
  position: relative;
}
.brand__r {
  font-size: 11px;
  font-weight: 600;
  margin-left: 1px;
  color: var(--c-gold);
  vertical-align: super;
  letter-spacing: 0;
}
.brand__divider {
  color: var(--c-gold);
  font-weight: 400;
  font-size: 18px;
  opacity: 0.8;
}
.brand__tag {
  font-family: var(--ff-sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: rgba(255, 255, 255, 0.78);
  text-transform: none;
}
.topbar.is-light .brand__tag { color: var(--c-text-soft); }

/* 导航链接 */
.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav__link {
  position: relative;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0.04em;
  padding: 8px 0;
  transition: color 0.3s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 2px;
  width: 0; height: 1px;
  background: var(--c-gold);
  transition: width 0.4s var(--ease);
}
.nav__link:hover { color: #fff; }
.nav__link:hover::after { width: 100%; }
.topbar.is-light .nav__link { color: var(--c-text-soft); }
.topbar.is-light .nav__link:hover { color: var(--c-ink); }
.nav__cta {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border: 1px solid var(--c-gold);
  color: var(--c-gold);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  transition: all 0.3s var(--ease);
}
.nav__cta:hover {
  background: var(--c-gold);
  color: var(--c-ink);
}
.topbar.is-light .nav__cta {
  background: var(--c-gold);
  color: var(--c-ink);
}
.topbar.is-light .nav__cta:hover {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: var(--c-gold);
}

/* 移动端汉堡按钮 */
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  position: relative;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 1.5px;
  background: #fff;
  margin: 5px auto;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}
.topbar.is-light .nav-toggle span { background: var(--c-ink); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 120px 0 80px;
  background: var(--c-deep);
  color: #fff;
  display: flex;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, #000 30%, transparent 80%);
}
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.55;
  animation: floatGlow 18s ease-in-out infinite;
}
.hero__glow--1 {
  width: 520px; height: 520px;
  top: -120px; right: -120px;
  background: radial-gradient(circle, rgba(212, 168, 90, 0.45), transparent 60%);
}
.hero__glow--2 {
  width: 600px; height: 600px;
  bottom: -200px; left: -180px;
  background: radial-gradient(circle, rgba(36, 88, 156, 0.5), transparent 60%);
  animation-delay: -8s;
}
@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.06); }
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  align-self: start;
  padding: 8px 16px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: rgba(255, 255, 255, 0.7);
  text-transform: none;
}
.hero__dot {
  width: 6px; height: 6px;
  background: var(--c-gold);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--c-gold);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.3); opacity: 0.7; }
}
.hero__title {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(48px, 7vw, 96px);
  line-height: 1.05;
  letter-spacing: -0.01em;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero__title-line {
  background: linear-gradient(180deg, #ffffff 0%, #C5D2E2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__title-sub {
  font-family: var(--ff-sans);
  font-weight: 300;
  font-size: clamp(20px, 2.4vw, 30px);
  letter-spacing: 0.24em;
  color: var(--c-gold);
  margin-top: 12px;
  padding-left: 4px;
}
.hero__lede {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.78);
}
.hero__lede strong {
  color: #fff;
  font-weight: 500;
  background: linear-gradient(180deg, transparent 60%, rgba(212, 168, 90, 0.25) 60%);
  padding: 0 2px;
}
.hero__cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn--primary {
  background: var(--c-gold);
  color: var(--c-ink);
  box-shadow: 0 8px 24px rgba(212, 168, 90, 0.28);
}
.btn--primary:hover {
  transform: translateY(-2px);
  background: var(--c-gold-2);
  box-shadow: 0 14px 32px rgba(212, 168, 90, 0.4);
}
.btn--ghost {
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #fff;
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
}

.hero__metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 24px;
  padding-top: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero__metrics li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 24px 0 0;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
}
.hero__metrics li:last-child { border-right: 0; }
.hero__metrics li:not(:first-child) { padding-left: 32px; }
.hero__metric-num {
  font-family: var(--ff-en);
  font-size: 44px;
  font-weight: 300;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
}
.hero__metric-unit {
  display: inline-block;
  font-size: 14px;
  color: var(--c-gold);
  margin-left: 4px;
  font-weight: 500;
}
.hero__metric-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.06em;
}

.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 32px;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: rgba(255, 255, 255, 0.12);
  z-index: 1;
}
.hero__scroll span {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 24px;
  background: var(--c-gold);
  animation: scrollDown 2.4s ease-in-out infinite;
}
@keyframes scrollDown {
  0% { transform: translateY(-24px); opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { transform: translateY(60px); opacity: 0; }
}

/* ========== 通用 Section ========== */
.section {
  padding: 120px 0;
  position: relative;
}
@media (max-width: 768px) {
  .section { padding: 72px 0; }
}
.section__head {
  max-width: 760px;
  margin: 0 auto 64px;
  text-align: center;
}
.section__kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.32em;
  color: var(--c-gold);
  margin-bottom: 20px;
  text-transform: uppercase;
  position: relative;
  padding: 0 24px;
}
.section__kicker::before, .section__kicker::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 16px; height: 1px;
  background: var(--c-gold);
  opacity: 0.5;
}
.section__kicker::before { left: 0; }
.section__kicker::after { right: 0; }
.section__title {
  font-family: var(--ff-serif);
  font-size: clamp(30px, 3.6vw, 48px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--c-ink);
  letter-spacing: -0.005em;
}
.section__title--left { text-align: left; }
.section__desc {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-text-soft);
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== 核心服务 ========== */
.section--services {
  background: var(--c-bg);
  position: relative;
}
.section--services::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line-2) 50%, transparent);
}
.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
}
@media (max-width: 980px) {
  .services { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .services { grid-template-columns: 1fr; }
}
.service-card {
  position: relative;
  padding: 44px 36px 36px;
  background: var(--c-bg-2);
  transition: background 0.4s var(--ease);
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--c-gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.5s var(--ease);
}
.service-card:hover {
  background: #fff;
}
.service-card:hover::before { transform: scaleY(1); }
.service-card__index {
  position: absolute;
  top: 24px; right: 32px;
  font-family: var(--ff-en);
  font-size: 56px;
  font-weight: 300;
  color: var(--c-line-2);
  line-height: 1;
  letter-spacing: -0.04em;
  transition: color 0.4s var(--ease);
}
.service-card:hover .service-card__index { color: var(--c-gold-soft); }
.service-card__icon {
  width: 56px; height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  color: var(--c-ink);
  margin-bottom: 28px;
  transition: all 0.4s var(--ease);
}
.service-card__icon svg { width: 26px; height: 26px; }
.service-card:hover .service-card__icon {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: var(--c-gold);
  transform: rotate(-3deg) scale(1.04);
}
.service-card__title {
  font-family: var(--ff-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 14px;
  line-height: 1.4;
}
.service-card__desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text-soft);
  margin-bottom: 24px;
}
.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--c-ink);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--c-gold);
  transition: gap 0.3s var(--ease), color 0.3s var(--ease);
}
.service-card__link:hover {
  gap: 10px;
  color: var(--c-gold);
}

/* ========== 业务全景 ========== */
.section--matrix {
  background: var(--c-ink);
  color: #fff;
}
.section--matrix .section__title { color: #fff; }
.section--matrix .section__desc { color: rgba(255, 255, 255, 0.65); }
.section--matrix .section__kicker { color: var(--c-gold); }
.matrix {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--r-lg);
  overflow: hidden;
}
@media (max-width: 1100px) { .matrix { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 860px)  { .matrix { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 560px)  { .matrix { grid-template-columns: repeat(2, 1fr); } }
.matrix-item {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 116px;
  padding: 22px 22px 18px;
  background: var(--c-ink);
  color: #fff;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}
.matrix-item::after {
  content: "↗";
  position: absolute;
  top: 16px; right: 18px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.35);
  transition: color 0.3s var(--ease), transform 0.3s var(--ease);
}
.matrix-item:hover {
  background: var(--c-deep-2);
}
.matrix-item:hover::after {
  color: var(--c-gold);
  transform: translate(2px, -2px);
}
.matrix-item__name {
  font-family: var(--ff-serif);
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #fff;
  margin-top: auto;
}
.matrix-item__hint {
  font-family: var(--ff-en);
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
  margin-top: 6px;
}

/* ========== 关于闫宝龙 ========== */
.section--about { background: var(--c-bg-2); }
.about {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 80px;
  align-items: start;
}
@media (max-width: 900px) {
  .about { grid-template-columns: 1fr; gap: 56px; }
}
.about__media {
  position: sticky;
  top: 100px;
}
@media (max-width: 900px) {
  .about__media { position: static; }
}
.about__frame {
  position: relative;
  border-radius: var(--r-lg);
  overflow: hidden;
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, #0B1B2B, #1a2c44);
  box-shadow: var(--shadow-2);
}
.about__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--r-lg);
  pointer-events: none;
}
.about__frame img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.1) contrast(1.02);
}
.about__signature {
  margin-top: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 24px;
  background: var(--c-bg);
  border-radius: var(--r-md);
  border-left: 3px solid var(--c-gold);
}
.about__sig-name {
  font-family: var(--ff-en);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: 0.06em;
}
.about__sig-line {
  flex: 0 0 24px;
  height: 1px;
  background: var(--c-line-2);
}
.about__sig-role {
  font-size: 12px;
  color: var(--c-text-soft);
  letter-spacing: 0.1em;
}

.about__body { }
.about__lede {
  margin: 24px 0 36px;
  font-size: 16.5px;
  line-height: 1.95;
  color: var(--c-text);
  max-width: 620px;
}
.about__lede strong {
  color: var(--c-ink);
  font-weight: 600;
  background: linear-gradient(180deg, transparent 60%, var(--c-gold-soft) 60%);
  padding: 0 4px;
}
.about__milestones {
  position: relative;
  border-left: 1px solid var(--c-line-2);
  padding-left: 28px;
  margin-bottom: 36px;
}
.about__milestones li {
  position: relative;
  padding: 8px 0 22px;
}
.about__milestones li::before {
  content: "";
  position: absolute;
  left: -34px; top: 16px;
  width: 8px; height: 8px;
  background: var(--c-bg-2);
  border: 2px solid var(--c-gold);
  border-radius: 50%;
}
.about__year {
  display: inline-block;
  font-family: var(--ff-en);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-ink);
  margin-right: 12px;
  letter-spacing: 0.04em;
}
.about__text {
  font-size: 15px;
  color: var(--c-text-soft);
  line-height: 1.7;
}
.about__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.about__tags span {
  padding: 6px 14px;
  font-size: 12.5px;
  color: var(--c-text-soft);
  background: var(--c-bg);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  letter-spacing: 0.04em;
  transition: all 0.3s var(--ease);
}
.about__tags span:hover {
  background: var(--c-ink);
  color: var(--c-gold);
  border-color: var(--c-ink);
}

/* ========== 关于 · 资质荣誉 ========== */
.about__creds {
  margin-top: 40px;
  padding-top: 36px;
  border-top: 1px solid var(--c-line);
}
.about__creds-title {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--ff-serif);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-ink);
  letter-spacing: 0.12em;
  margin-bottom: 22px;
  text-transform: uppercase;
}
.about__creds-bar {
  display: inline-block;
  width: 24px; height: 1px;
  background: var(--c-gold);
}
.about__cred-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
}
@media (max-width: 700px) {
  .about__cred-list { grid-template-columns: 1fr; }
}
.about__cred {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 18px 18px;
  background: var(--c-bg-2);
  transition: background 0.3s var(--ease);
}
.about__cred:hover { background: #fff; }
.about__cred-icon {
  flex: 0 0 36px;
  width: 36px; height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--c-bg);
  color: var(--c-ink);
  transition: all 0.3s var(--ease);
}
.about__cred-icon svg { width: 18px; height: 18px; }
.about__cred:hover .about__cred-icon {
  background: var(--c-ink);
  color: var(--c-gold);
  transform: rotate(-4deg);
}
.about__cred-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.about__cred-name {
  font-family: var(--ff-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.about__cred-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--c-ink);
  border-bottom: 1px solid var(--c-gold);
  padding-bottom: 1px;
  transition: color 0.3s var(--ease), gap 0.3s var(--ease);
}
.about__cred-link:hover {
  color: var(--c-gold);
  gap: 7px;
}
.about__cred-sub {
  font-size: 12.5px;
  color: var(--c-text-soft);
  letter-spacing: 0.04em;
}
.about__hl {
  background: linear-gradient(180deg, transparent 60%, var(--c-gold-soft) 60%);
  padding: 0 6px;
  color: var(--c-ink);
}

/* ========== 工业品行业获客专题 ========== */
.section--industrial {
  background: var(--c-bg);
  position: relative;
  overflow: hidden;
}
.section--industrial::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line-2) 50%, transparent);
}
.section--industrial::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(11, 27, 43, 0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 50%, #000 30%, transparent 80%);
  pointer-events: none;
}
.industrial {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
  align-items: start;
}
@media (max-width: 980px) {
  .industrial { grid-template-columns: 1fr; gap: 40px; }
}
.industrial__intro { position: sticky; top: 100px; }
@media (max-width: 980px) { .industrial__intro { position: static; } }
.industrial__hl {
  font-size: 0.7em;
  color: var(--c-gold);
  font-weight: 400;
  letter-spacing: 0.04em;
}
.industrial__lede {
  margin-top: 20px;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--c-text);
  max-width: 520px;
}
.industrial__lede strong {
  color: var(--c-ink);
  font-weight: 600;
  background: linear-gradient(180deg, transparent 60%, var(--c-gold-soft) 60%);
  padding: 0 2px;
}
.industrial__cta { margin-top: 28px; }
.industrial__body {
  display: grid;
  gap: 20px;
}
.industrial__panel {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  padding: 36px 32px;
  transition: all 0.4s var(--ease);
}
.industrial__panel:hover {
  border-color: var(--c-gold);
  box-shadow: var(--shadow-1);
}
.industrial__panel--dark {
  background: var(--c-ink);
  border-color: var(--c-ink);
  color: #fff;
}
.industrial__panel--dark:hover {
  border-color: var(--c-gold);
}
.industrial__panel-title {
  font-family: var(--ff-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 12px;
  letter-spacing: 0.04em;
}
.industrial__panel--dark .industrial__panel-title { color: #fff; }
.industrial__panel-title::before {
  content: "";
  width: 24px; height: 1.5px;
  background: var(--c-gold);
}
.industrial__industries {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  overflow: hidden;
}
@media (max-width: 560px) {
  .industrial__industries { grid-template-columns: 1fr; }
}
.industrial__industries li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--c-bg-2);
  font-size: 14px;
  color: var(--c-text);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.industrial__industries li:hover {
  background: var(--c-gold-soft);
  color: var(--c-ink);
}
.industrial__num {
  font-family: var(--ff-en);
  font-size: 13px;
  font-weight: 600;
  color: var(--c-gold);
  letter-spacing: 0.04em;
  flex: 0 0 auto;
}
.industrial__plays {
  display: flex;
  flex-direction: column;
  gap: 20px;
  counter-reset: ip;
}
.industrial__plays li {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.industrial__plays li:last-child { border-bottom: 0; }
.industrial__play-num {
  flex: 0 0 44px;
  width: 44px; height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(212, 168, 90, 0.12);
  border: 1px solid rgba(212, 168, 90, 0.4);
  color: var(--c-gold);
  font-family: var(--ff-en);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
}
.industrial__plays strong {
  display: block;
  font-family: var(--ff-serif);
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}
.industrial__plays p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

/* ========== 服务流程 ========== */
.section--process {
  background: var(--c-bg);
}
.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
}
@media (max-width: 980px) {
  .process { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (max-width: 560px) {
  .process { grid-template-columns: 1fr; }
}
.process::before {
  content: "";
  position: absolute;
  top: 38px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg, var(--c-gold) 0%, var(--c-gold) 50%, var(--c-line-2) 50%, var(--c-line-2) 100%);
  background-size: 12px 1px;
  z-index: 0;
}
@media (max-width: 980px) { .process::before { display: none; } }
.process__step {
  position: relative;
  padding: 0 16px;
  text-align: center;
  z-index: 1;
}
.process__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 76px; height: 76px;
  margin-bottom: 24px;
  font-family: var(--ff-en);
  font-size: 22px;
  font-weight: 300;
  color: var(--c-ink);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line-2);
  border-radius: 50%;
  position: relative;
  transition: all 0.4s var(--ease);
}
.process__step:hover .process__num {
  background: var(--c-ink);
  color: var(--c-gold);
  border-color: var(--c-ink);
  transform: scale(1.05);
}
.process__title {
  font-family: var(--ff-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
  margin-bottom: 10px;
}
.process__desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-text-soft);
}

/* ========== FAQ ========== */
.section--faq { background: var(--c-bg-2); }
.faq {
  display: grid;
  grid-template-columns: 4fr 8fr;
  gap: 80px;
  align-items: start;
}
@media (max-width: 980px) {
  .faq { grid-template-columns: 1fr; gap: 40px; }
}
.faq__head { position: sticky; top: 100px; }
@media (max-width: 980px) { .faq__head { position: static; } }
.faq__head .section__desc { margin-left: 0; margin-right: 0; }
.faq__list { display: flex; flex-direction: column; gap: 0; }
.faq-item {
  border-top: 1px solid var(--c-line);
  transition: background 0.3s var(--ease);
}
.faq-item:last-child { border-bottom: 1px solid var(--c-line); }
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 8px;
  cursor: pointer;
  list-style: none;
  transition: padding 0.3s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item__q {
  font-family: var(--ff-serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--c-ink);
  line-height: 1.5;
}
.faq-item__toggle {
  position: relative;
  flex: 0 0 22px;
  width: 22px; height: 22px;
}
.faq-item__toggle::before, .faq-item__toggle::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  background: var(--c-ink);
  transition: transform 0.4s var(--ease);
}
.faq-item__toggle::before {
  width: 14px; height: 1.5px;
  transform: translate(-50%, -50%);
}
.faq-item__toggle::after {
  width: 1.5px; height: 14px;
  transform: translate(-50%, -50%);
}
.faq-item[open] .faq-item__toggle::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 0; }
.faq-item[open] summary { padding-bottom: 12px; }
.faq-item[open] .faq-item__q { color: var(--c-gold); }
.faq-item__a {
  padding: 0 8px 24px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-text-soft);
  max-width: 720px;
}

/* ========== 联系方式 ========== */
.section--contact {
  background: var(--c-deep);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section--contact::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, #000 30%, transparent 80%);
  pointer-events: none;
}
.section--contact .section__title { color: #fff; }
.section--contact .section__desc { color: rgba(255, 255, 255, 0.7); }
.contact__head { text-align: center; margin-bottom: 64px; position: relative; z-index: 1; }
.contact__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}
@media (max-width: 1100px) { .contact__grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 820px)  { .contact__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px)  { .contact__grid { grid-template-columns: 1fr; } }
.contact-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px 22px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--r-lg);
  color: #fff;
  transition: all 0.4s var(--ease);
  min-height: 200px;
}
.contact-card:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--c-gold);
  transform: translateY(-4px);
}
.contact-card--qr {
  align-items: center;
  text-align: center;
}
.contact-card__icon {
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(212, 168, 90, 0.1);
  border: 1px solid rgba(212, 168, 90, 0.3);
  border-radius: 50%;
  color: var(--c-gold);
  margin-bottom: 18px;
}
.contact-card__icon svg { width: 20px; height: 20px; }
.contact-card__label {
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.55);
  letter-spacing: 0.16em;
  margin-bottom: 6px;
  text-transform: uppercase;
}
.contact-card__value {
  font-family: var(--ff-en);
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: #fff;
  margin-bottom: 6px;
  word-break: break-all;
  line-height: 1.3;
}
.contact-card--qr .contact-card__value { font-size: 16px; }
.contact-card__hint {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  letter-spacing: 0.04em;
  margin-top: auto;
}
.contact-card__qr {
  width: 120px; height: 120px;
  background: #fff;
  border-radius: var(--r-md);
  padding: 8px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card__qr img {
  width: 100%; height: 100%;
  object-fit: contain;
  border-radius: 4px;
}
.contact-card--qr.is-empty .contact-card__qr {
  background: rgba(255, 255, 255, 0.05);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.4);
  font-size: 12px;
}

/* ========== 底部 ========== */
.footer {
  background: var(--c-ink-2);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 72px;
}
.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 64px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
@media (max-width: 900px) {
  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
}
.brand--footer { color: #fff; }
.brand--footer .brand__tag { color: rgba(255, 255, 255, 0.6); }
.footer__intro {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.55);
  max-width: 420px;
}
.footer__title {
  font-family: var(--ff-serif);
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.06em;
}
.footer__links li, .footer__contact li {
  margin-bottom: 10px;
  font-size: 14px;
}
.footer__links a, .footer__contact a {
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.3s var(--ease);
}
.footer__links a:hover, .footer__contact a:hover { color: var(--c-gold); }
.footer__legal {
  padding: 24px 0;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.45);
}
.footer__legal-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.footer__copyright a, .footer__record a {
  color: rgba(255, 255, 255, 0.75);
  transition: color 0.3s var(--ease);
}
.footer__copyright a:hover, .footer__record a:hover { color: var(--c-gold); }
@media (max-width: 600px) {
  .footer__legal-inner { flex-direction: column; align-items: flex-start; }
}

/* ========== 回到顶部 ========== */
.to-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  width: 44px; height: 44px;
  background: var(--c-gold);
  color: var(--c-ink);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(212, 168, 90, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s var(--ease);
  z-index: 50;
}
.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.to-top:hover {
  background: var(--c-ink);
  color: var(--c-gold);
}

/* ========== 数据显现动效 ========== */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ========== 移动端导航 ========== */
@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    inset: 72px 0 0 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--c-ink);
    padding: 32px 24px;
    gap: 4px;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
    overflow-y: auto;
  }
  .topbar.is-light .nav { background: var(--c-bg-2); }
  .nav.is-open { transform: translateX(0); }
  .nav__link {
    padding: 16px 8px;
    font-size: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .topbar.is-light .nav__link { border-bottom-color: var(--c-line); }
  .nav__cta {
    margin-top: 24px;
    align-self: center;
  }
}

@media (max-width: 768px) {
  .hero__metrics {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px 0;
  }
  .hero__metrics li:nth-child(2) { border-right: 0; padding-left: 0; }
  .hero__metrics li:nth-child(1), .hero__metrics li:nth-child(2) {
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }
  .hero__metrics li:nth-child(3) { padding-left: 24px; }
  .hero__metric-num { font-size: 36px; }
}