/* =================================================================
   闫宝龙® · 西安小程序定制开发营销站 — 主样式
   调性：编辑杂志感 + 克制的东方美学
   字体：Noto Serif SC（标题）/ Noto Sans SC（正文）/ ZCOOL XiaoWei（点缀）
   ================================================================= */

/* ---------- 1. 主题变量 ---------- */
:root {
  --ink: #0f0f0f;
  --ink-soft: #2a2a2a;
  --paper: #f7f3ec;
  --paper-2: #efeae0;
  --line: #e5e0d6;
  --line-soft: #ece6da;
  --cinnabar: #b8232a;
  --cinnabar-deep: #931c22;
  --gold: #c9a961;
  --text: #1b1b1b;
  --text-soft: #4a4a4a;
  --text-muted: #7a7a7a;
  --max: 1200px;
  --radius-sm: 4px;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(15, 15, 15, 0.04);
  --shadow: 0 8px 30px -12px rgba(15, 15, 15, 0.12);
  --shadow-lg: 0 30px 60px -20px rgba(15, 15, 15, 0.18);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast: 180ms;
  --t-base: 320ms;
  --t-slow: 600ms;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "ZCOOL XiaoWei", "Noto Serif SC", serif;
  --font-num: "DM Serif Display", "Noto Serif SC", serif;
}

/* ---------- 2. Reset & Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
a:hover {
  color: var(--cinnabar);
}
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}
ul,
ol {
  list-style: none;
  padding: 0;
  margin: 0;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-serif);
  color: var(--ink);
  margin: 0;
  line-height: 1.3;
  letter-spacing: 0.01em;
}

/* 选区颜色 */
::selection {
  background: var(--cinnabar);
  color: var(--paper);
}

/* ---------- 3. Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.section {
  padding: 110px 0;
  position: relative;
}
.section-alt {
  background: var(--paper-2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 64px;
}
.section-kicker {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.32em;
  color: var(--cinnabar);
  margin-bottom: 18px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.section-lede {
  font-size: 16px;
  color: var(--text-soft);
  line-height: 1.85;
}

/* 滚动进入视口动画 */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 900ms var(--ease),
    transform 900ms var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 4. Header + Nav ---------- */
.site-header {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  overflow: hidden;
}
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(15, 15, 15, 0.6);
  backdrop-filter: blur(14px) saturate(160%);
  -webkit-backdrop-filter: blur(14px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition:
    background var(--t-base) var(--ease),
    border-color var(--t-base) var(--ease),
    padding var(--t-base) var(--ease);
}
.navbar.is-scrolled {
  background: rgba(15, 15, 15, 0.92);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  padding: 10px 0;
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 700;
  color: var(--paper);
  font-size: 19px;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.logo-mark {
  display: inline-flex;
  align-items: flex-start;
}
.logo-r {
  font-size: 9px;
  margin-left: 1px;
  margin-top: 2px;
  color: var(--gold);
  font-weight: 500;
}
.logo-sep {
  color: rgba(247, 243, 236, 0.4);
  font-weight: 300;
}
.logo-sub {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 14px;
  color: rgba(247, 243, 236, 0.75);
  letter-spacing: 0.1em;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav-list a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 13.5px;
  color: rgba(247,243,236,0.78);
  font-weight: 400;
  position: relative;
  transition: color var(--t-fast) var(--ease);
  white-space: nowrap;
}
.nav-list a::after {
  content: "";
  position: absolute;
  left: 12px; right: 12px; bottom: 4px;
  height: 1px;
  background: var(--cinnabar);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base) var(--ease);
}
.nav-list a:hover {
  color: var(--paper);
}
.nav-list a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  background: var(--cinnabar);
  color: var(--paper);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition:
    background var(--t-fast) var(--ease),
    transform var(--t-fast) var(--ease);
}
.nav-cta:hover {
  background: var(--cinnabar-deep);
  color: var(--paper);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--paper);
  transition:
    transform var(--t-base) var(--ease),
    opacity var(--t-base) var(--ease);
}
.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);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 12px 28px 24px;
  background: rgba(15, 15, 15, 0.96);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.mobile-nav a {
  padding: 14px 0;
  font-size: 15px;
  color: rgba(247, 243, 236, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.mobile-nav a:hover {
  color: var(--cinnabar);
}
.mobile-nav .mobile-tel {
  color: var(--cinnabar);
  font-weight: 500;
}

/* ---------- 5. Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 160px 0 120px;
  display: flex;
  align-items: center;
  color: var(--paper);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(
    ellipse 80% 60% at 50% 40%,
    #000 40%,
    transparent 100%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 40%,
    #000 40%,
    transparent 100%
  );
}
.hero-glow {
  position: absolute;
  top: 20%;
  left: 50%;
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(184, 35, 42, 0.18) 0%,
    transparent 60%
  );
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  letter-spacing: 0.4em;
  color: rgba(247, 243, 236, 0.7);
  text-transform: uppercase;
  margin-bottom: 36px;
  font-weight: 500;
}
.eyebrow-line {
  display: inline-block;
  width: 36px;
  height: 1px;
  background: var(--cinnabar);
}
.hero-title {
  font-size: clamp(56px, 9vw, 128px);
  font-weight: 900;
  line-height: 0.95;
  letter-spacing: 0.02em;
  color: var(--paper);
  margin-bottom: 36px;
}
.hero-title-line {
  display: block;
}
.hero-title-line.accent {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  color: var(--cinnabar);
  font-size: 0.8em;
  margin-top: 8px;
}
.hero-sub {
  max-width: 620px;
  margin: 0 auto 48px;
  font-size: 17px;
  line-height: 1.9;
  color: rgba(247, 243, 236, 0.78);
  font-weight: 300;
}
.hero-cta {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 80px;
}
.hero-meta {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
  padding-top: 48px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-meta li {
  text-align: center;
}
.hero-meta strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
  margin-bottom: 6px;
  letter-spacing: 0.04em;
}
.hero-meta span {
  font-size: 13px;
  color: rgba(247, 243, 236, 0.55);
  letter-spacing: 0.04em;
}
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 38px;
  border: 1px solid rgba(247, 243, 236, 0.3);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
  z-index: 2;
}
.hero-scroll span {
  display: block;
  width: 2px;
  height: 6px;
  background: rgba(247, 243, 236, 0.7);
  border-radius: 1px;
  animation: scrollDot 1.8s var(--ease) infinite;
}
@keyframes scrollDot {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(12px);
    opacity: 0;
  }
}

/* ---------- 6. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: var(--radius-sm);
  transition: all var(--t-base) var(--ease);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--cinnabar);
  color: var(--paper);
  border-color: var(--cinnabar);
}
.btn-primary:hover {
  background: var(--cinnabar-deep);
  border-color: var(--cinnabar-deep);
  color: var(--paper);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -10px rgba(184, 35, 42, 0.4);
}
.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: rgba(247, 243, 236, 0.35);
}
.btn-ghost:hover {
  background: rgba(247, 243, 236, 0.08);
  border-color: var(--paper);
  color: var(--paper);
  transform: translateY(-2px);
}
.section-alt .btn-ghost,
.about-section .btn-ghost,
.contact-section .btn-ghost {
  color: var(--ink);
  border-color: rgba(15, 15, 15, 0.2);
}
.section-alt .btn-ghost:hover,
.about-section .btn-ghost:hover,
.contact-section .btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

/* ---------- 7. 服务类型卡片 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.service-card {
  position: relative;
  background: var(--paper);
  padding: 48px 36px 40px;
  transition:
    background var(--t-base) var(--ease),
    transform var(--t-base) var(--ease);
}
.service-card:hover {
  background: #fff;
  transform: translateY(-4px);
  z-index: 1;
  box-shadow: var(--shadow);
}
.service-num {
  font-family: var(--font-num);
  font-size: 42px;
  font-style: italic;
  color: var(--cinnabar);
  line-height: 1;
  margin-bottom: 24px;
  font-weight: 400;
}
.service-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--ink);
}
.service-card p {
  font-size: 14.5px;
  color: var(--text-soft);
  line-height: 1.85;
  margin: 0;
}
.service-card::after {
  content: "→";
  position: absolute;
  top: 48px;
  right: 36px;
  font-size: 18px;
  color: var(--line);
  transition:
    color var(--t-base) var(--ease),
    transform var(--t-base) var(--ease);
}
.service-card:hover::after {
  color: var(--cinnabar);
  transform: translateX(4px);
}

/* ---------- 8. 行业方案 ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.industry-card {
  padding: 36px 28px 32px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--t-base) var(--ease);
  position: relative;
  overflow: hidden;
}
.industry-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--cinnabar);
  transition: width var(--t-slow) var(--ease);
}
.industry-card:hover {
  background: #fff;
  border-color: var(--cinnabar);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.industry-card:hover::before {
  width: 100%;
}
.industry-card h3 {
  font-size: 20px;
  margin-bottom: 10px;
  color: var(--ink);
}
.industry-card p {
  margin: 0;
  font-size: 14px;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ---------- 9. 开发流程 ---------- */
.process-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  position: relative;
}
.process-list li {
  padding: 0 18px;
  position: relative;
  text-align: left;
  border-left: 1px dashed var(--line);
}
.process-list li:first-child {
  border-left: 0;
  padding-left: 0;
}
.process-step {
  display: block;
  font-family: var(--font-num);
  font-size: 56px;
  font-style: italic;
  color: var(--cinnabar);
  line-height: 1;
  margin-bottom: 16px;
  font-weight: 400;
}
.process-list h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--ink);
}
.process-list p {
  margin: 0;
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.7;
}

/* ---------- 10. 核心优势 ---------- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.advantage-item {
  text-align: center;
  padding: 40px 20px 36px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: all var(--t-base) var(--ease);
}
.advantage-item:hover {
  background: #fff;
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.advantage-num {
  display: block;
  font-family: var(--font-num);
  font-size: 64px;
  font-weight: 400;
  font-style: italic;
  line-height: 1;
  color: var(--cinnabar);
  margin-bottom: 16px;
}
.advantage-num small {
  font-size: 18px;
  color: var(--ink);
  font-style: normal;
  font-family: var(--font-serif);
  margin-left: 2px;
}
.advantage-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--ink);
}
.advantage-item p {
  font-size: 13.5px;
  color: var(--text-soft);
  line-height: 1.75;
  margin: 0;
}

/* ---------- 11. 关于闫宝龙 ---------- */
.about-section {
  background: var(--ink);
  color: var(--paper);
}
.about-section .section-kicker {
  color: var(--gold);
}
.about-section .section-title {
  color: var(--paper);
}
.about-section .section-lede {
  color: rgba(247, 243, 236, 0.7);
}
.about-inner {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 80px;
  align-items: start;
}
.about-photo {
  margin: 0;
  position: sticky;
  top: 120px;
}
.about-photo img {
  width: 100%;
  border-radius: var(--radius);
  filter: grayscale(0.05) contrast(1.02);
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.about-photo figcaption {
  margin-top: 18px;
  font-size: 13px;
  color: rgba(247, 243, 236, 0.6);
  letter-spacing: 0.16em;
  text-align: center;
}
.about-text {
  max-width: 640px;
}
.about-text p {
  font-size: 15.5px;
  line-height: 1.95;
  color: rgba(247, 243, 236, 0.78);
  margin: 0 0 22px;
}
.about-timeline {
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 32px;
}
.about-timeline li {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 14.5px;
  color: rgba(247, 243, 236, 0.8);
  line-height: 1.6;
  align-items: baseline;
}
.about-timeline li span {
  font-family: var(--font-num);
  font-style: italic;
  font-size: 22px;
  color: var(--gold);
  font-weight: 400;
}

/* ---------- 12. FAQ ---------- */
.faq-list {
  max-width: 920px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 26px 8px;
  text-align: left;
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.5;
  letter-spacing: 0.02em;
  transition: color var(--t-fast) var(--ease);
}
.faq-q:hover {
  color: var(--cinnabar);
}
.faq-q span:first-child {
  flex: 1;
}
.faq-icon {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 1.5px;
  background: var(--ink);
  transform: translate(-50%, -50%);
  transition:
    transform var(--t-base) var(--ease),
    background var(--t-fast) var(--ease);
}
.faq-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-q:hover .faq-icon::before,
.faq-q:hover .faq-icon::after {
  background: var(--cinnabar);
}
.faq-q[aria-expanded="true"] .faq-icon::after {
  transform: translate(-50%, -50%) rotate(0);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow) var(--ease);
}
.faq-a p {
  margin: 0;
  padding: 0 8px 28px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-soft);
}

/* ---------- 13. 联系方式 ---------- */
.contact-section {
  background: var(--paper-2);
}
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 80px;
  align-items: center;
}
.contact-text {
  max-width: 640px;
}
.contact-list {
  margin: 36px 0 40px;
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}
.contact-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.contact-label {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  text-transform: uppercase;
}
.contact-value {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 500;
  color: var(--ink);
  letter-spacing: 0.02em;
}
a.contact-value:hover {
  color: var(--cinnabar);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.contact-actions .btn-ghost {
  color: var(--ink);
  border-color: rgba(15, 15, 15, 0.2);
}
.contact-actions .btn-ghost:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.contact-qr {
  margin: 0;
  text-align: center;
  padding: 36px 28px 32px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.contact-qr img {
  width: 240px;
  height: 240px;
  margin: 0 auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
}
.contact-qr figcaption {
  margin-top: 18px;
  font-size: 13px;
  color: var(--text-soft);
  letter-spacing: 0.16em;
}

/* ---------- 14. 服务矩阵 ---------- */
.section-services {
  background: var(--ink);
  color: var(--paper);
}
.section-services .section-kicker {
  color: var(--gold);
}
.section-services .section-title {
  color: var(--paper);
}
.section-services .section-lede {
  color: rgba(247, 243, 236, 0.7);
}

.service-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);
}
.service-matrix li {
  background: var(--ink);
}
.service-matrix a {
  display: block;
  padding: 22px 16px;
  font-size: 14px;
  color: rgba(247, 243, 236, 0.75);
  letter-spacing: 0.04em;
  text-align: center;
  transition: all var(--t-base) var(--ease);
  position: relative;
}
.service-matrix a::after {
  content: "↗";
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 10px;
  color: rgba(247, 243, 236, 0.25);
  transition:
    color var(--t-fast) var(--ease),
    transform var(--t-base) var(--ease);
}
.service-matrix a:hover {
  background: var(--cinnabar);
  color: var(--paper);
}
.service-matrix a:hover::after {
  color: var(--paper);
  transform: translate(2px, -2px);
}

/* ---------- 15. Footer ---------- */
.site-footer {
  background: #080808;
  color: rgba(247, 243, 236, 0.7);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 60px;
  padding: 80px 28px 48px;
}
.footer-brand {
  max-width: 560px;
}
.footer-logo {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.footer-logo sup {
  font-size: 9px;
  color: var(--gold);
  margin-left: 1px;
}
.footer-sep {
  color: rgba(247, 243, 236, 0.3);
  font-weight: 300;
  margin: 0 8px;
}
.footer-sub {
  font-family: var(--font-sans);
  font-size: 14px;
  color: rgba(247, 243, 236, 0.6);
  font-weight: 400;
  letter-spacing: 0.1em;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.85;
  margin: 0 0 16px;
  color: rgba(247, 243, 236, 0.65);
}
.footer-contact {
  font-size: 14px;
  margin: 0;
  color: rgba(247, 243, 236, 0.7);
}
.footer-contact a {
  color: rgba(247, 243, 236, 0.85);
}
.footer-contact a:hover {
  color: var(--cinnabar);
}

.footer-nav h3 {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 18px;
  text-transform: uppercase;
  font-weight: 500;
}
.footer-nav ul {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}
.footer-nav a {
  font-size: 14px;
  color: rgba(247, 243, 236, 0.7);
  transition: color var(--t-fast) var(--ease);
}
.footer-nav a:hover {
  color: var(--cinnabar);
}

.footer-copyright {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 24px 0;
  font-size: 13px;
  color: rgba(247,243,236,0.5);
  letter-spacing: 0.04em;
}
.footer-copy-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: center;
  text-align: center;
}
.footer-copyright p { margin: 0; }
.footer-copyright a {
  color: rgba(247,243,236,0.75);
  text-decoration: none;
  border-bottom: 1px dotted rgba(247,243,236,0.25);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.footer-copyright a:hover { color: var(--cinnabar); border-bottom-color: var(--cinnabar); }

/* ---------- 16. FAB ---------- */
.fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--cinnabar);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 30px -8px rgba(184, 35, 42, 0.5);
  z-index: 50;
  transition:
    transform var(--t-base) var(--ease),
    background var(--t-fast) var(--ease);
}
.fab:hover {
  background: var(--cinnabar-deep);
  color: var(--paper);
  transform: translateY(-2px) scale(1.05);
}

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1100px) {
  .industry-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantage-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .process-list {
    grid-template-columns: repeat(3, 1fr);
    row-gap: 40px;
  }
  .process-list li {
    border-left: 0;
    padding: 0 12px;
  }
  .process-list li:not(:nth-child(3n + 1)) {
    border-left: 1px dashed var(--line);
  }
  .process-list li:nth-child(n + 4) {
    border-top: 1px dashed var(--line);
    padding-top: 32px;
  }
  .service-matrix {
    grid-template-columns: repeat(4, 1fr);
  }
  .about-inner {
    grid-template-columns: 1fr;
    gap: 60px;
  }
  .about-photo {
    position: static;
    max-width: 360px;
    margin: 0 auto;
  }
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 50px;
  }
  .contact-qr {
    max-width: 320px;
    margin: 0 auto;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 80px 0;
  }
  .section-head {
    margin-bottom: 48px;
  }
  .container {
    padding: 0 22px;
  }

  .nav-list,
  .nav-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .mobile-nav.is-open {
    display: flex;
  }
  .logo {
    font-size: 16px;
  }
  .logo-sub {
    font-size: 12px;
  }

  .hero {
    padding: 130px 0 80px;
    min-height: auto;
  }
  .hero-title {
    font-size: clamp(44px, 14vw, 80px);
  }
  .hero-eyebrow {
    font-size: 10px;
    gap: 12px;
    margin-bottom: 28px;
  }
  .eyebrow-line {
    width: 24px;
  }
  .hero-sub {
    font-size: 15px;
    margin-bottom: 36px;
  }
  .hero-cta {
    margin-bottom: 56px;
  }
  .hero-cta .btn {
    padding: 12px 22px;
    font-size: 14px;
  }
  .hero-meta {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 16px;
    padding-top: 36px;
  }
  .hero-meta strong {
    font-size: 16px;
  }
  .hero-meta span {
    font-size: 12px;
  }
  .hero-scroll {
    display: none;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }
  .service-card {
    padding: 40px 28px 32px;
  }
  .service-card::after {
    top: 40px;
    right: 28px;
  }

  .industry-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .industry-card {
    padding: 28px 24px 24px;
  }

  .process-list {
    grid-template-columns: 1fr 1fr;
  }
  .process-list li {
    padding: 0 12px;
  }
  .process-list li:not(:nth-child(2n + 1)) {
    border-left: 1px dashed var(--line);
  }
  .process-list li:nth-child(n + 3) {
    border-top: 1px dashed var(--line);
    padding-top: 24px;
    margin-top: 8px;
  }
  .process-list li:nth-child(2n + 1) {
    padding-left: 0;
  }
  .process-step {
    font-size: 44px;
  }

  .advantage-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .advantage-item {
    padding: 32px 14px 28px;
  }
  .advantage-num {
    font-size: 52px;
  }

  .service-matrix {
    grid-template-columns: repeat(2, 1fr);
  }
  .service-matrix a {
    padding: 18px 10px;
    font-size: 13px;
  }

  .contact-list li {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 16px 0;
  }
  .contact-value {
    font-size: 17px;
  }
  .contact-qr img {
    width: 200px;
    height: 200px;
  }

  .about-timeline li {
    grid-template-columns: 60px 1fr;
    gap: 14px;
  }
  .about-timeline li span {
    font-size: 18px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 60px 22px 36px;
  }
  .footer-nav ul {
    grid-template-columns: 1fr 1fr;
  }

  .fab {
    right: 16px;
    bottom: 16px;
    width: 50px;
    height: 50px;
  }
}

@media (max-width: 480px) {
  .section-title {
    font-size: 28px;
  }
  .hero-title {
    font-size: 48px;
  }
  .advantage-grid {
    grid-template-columns: 1fr;
  }
  .process-list {
    grid-template-columns: 1fr;
  }
  .process-list li {
    border-left: 0;
    padding: 0 0 24px;
    border-bottom: 1px dashed var(--line);
  }
  .process-list li:nth-child(n + 2) {
    border-top: 0;
    padding-top: 24px;
    margin-top: 0;
  }
  .process-list li:last-child {
    border-bottom: 0;
    padding-bottom: 0;
  }
  .footer-copy-inner {
    flex-direction: column;
    gap: 6px;
  }
}

/* ---------- 18. 打印 ---------- */
@media print {
  .navbar,
  .hero-bg,
  .hero-scroll,
  .fab,
  .mobile-nav,
  .nav-toggle {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  .section {
    padding: 24px 0;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}