/* ============ Design Tokens ============ */
:root {
  --c-ink: #0b2545;
  --c-ink-2: #13315c;
  --c-line: #e3e8ee;
  --c-bg: #ffffff;
  --c-bg-alt: #f6f8fb;
  --c-bg-deep: #0b2545;
  --c-text: #1a1f2e;
  --c-text-soft: #5a6478;
  --c-muted: #8a93a6;
  --c-accent: #f2a93b;
  --c-accent-2: #4285f4;
  --c-google-blue: #4285f4;
  --c-google-red: #ea4335;
  --c-google-yellow: #fbbc04;
  --c-google-green: #34a853;

  --serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans:
    "Noto Sans SC", -apple-system, "PingFang SC", "Microsoft YaHei",
    "Hiragino Sans GB", sans-serif;

  --shadow-sm: 0 1px 2px rgba(11, 37, 69, 0.05);
  --shadow-md: 0 8px 24px rgba(11, 37, 69, 0.08);
  --shadow-lg: 0 24px 60px rgba(11, 37, 69, 0.16);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --container: 1200px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--c-accent-2);
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 600;
  color: var(--c-ink);
  line-height: 1.35;
  letter-spacing: 0.01em;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

/* ============ Header ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition:
    box-shadow 0.3s ease,
    border-color 0.3s ease,
    background 0.3s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 8px 28px rgba(11, 37, 69, 0.08);
  border-bottom-color: var(--c-line);
  background: rgba(255, 255, 255, 0.94);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
}
.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: 0.02em;
  position: relative;
}
.brand-r {
  font-size: 11px;
  color: var(--c-ink-2);
  position: absolute;
  top: 0;
  right: -12px;
  font-weight: 500;
}
.brand-divider {
  color: var(--c-muted);
  font-weight: 300;
  font-size: 18px;
}
.brand-suffix {
  font-size: 15px;
  color: var(--c-text-soft);
  font-weight: 500;
  letter-spacing: 0.04em;
}
.primary-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.primary-nav a {
  font-size: 14px;
  color: var(--c-text);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
}
.primary-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}
.primary-nav a:hover::after {
  transform: scaleX(1);
}
.primary-nav a:hover {
  color: var(--c-ink);
}
.primary-nav .nav-cta {
  background: var(--c-ink);
  color: #fff !important;
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}
.primary-nav .nav-cta::after {
  display: none;
}
.primary-nav .nav-cta:hover {
  background: var(--c-ink-2);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--c-ink);
  border-radius: 2px;
  transition:
    transform 0.2s ease,
    opacity 0.2s ease;
}
.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 12px 20px 20px;
  background: #fff;
  border-top: 1px solid var(--c-line);
}
.mobile-nav a {
  padding: 12px 8px;
  font-size: 15px;
  border-bottom: 1px solid var(--c-line);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav.is-open {
  display: flex;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 140px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, #f6f8fb 0%, #ffffff 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(11, 37, 69, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(11, 37, 69, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  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-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
}
.hero-orb-a {
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(66, 133, 244, 0.5), transparent 70%);
  top: -120px;
  right: -80px;
}
.hero-orb-b {
  width: 360px;
  height: 360px;
  background: radial-gradient(
    circle,
    rgba(242, 169, 59, 0.45),
    transparent 70%
  );
  bottom: -120px;
  left: -60px;
}

.hero-inner {
  position: relative;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.32em;
  color: var(--c-accent-2);
  padding: 6px 14px;
  background: rgba(66, 133, 244, 0.08);
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero-title {
  font-size: 52px;
  line-height: 1.18;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 22px;
}
.title-accent {
  background: linear-gradient(120deg, var(--c-google-blue), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
  transition: opacity 0.4s ease;
}
.hero-sub {
  font-size: 17px;
  color: var(--c-text-soft);
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-primary {
  background: var(--c-ink);
  color: #fff;
  box-shadow: 0 10px 24px rgba(11, 37, 69, 0.22);
}
.btn-primary:hover {
  background: var(--c-ink-2);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 32px rgba(11, 37, 69, 0.28);
}
.btn-ghost {
  background: transparent;
  color: var(--c-ink);
  border: 1.5px solid var(--c-ink);
}
.btn-ghost:hover {
  background: var(--c-ink);
  color: #fff;
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 44px;
  flex-wrap: wrap;
}
.hero-stats li {
  display: flex;
  flex-direction: column;
}
.hero-stats strong {
  font-family: var(--serif);
  font-size: 36px;
  color: var(--c-ink);
  font-weight: 700;
  line-height: 1;
}
.hero-stats strong small {
  font-size: 18px;
  color: var(--c-accent);
  font-weight: 600;
}
.hero-stats span {
  font-size: 13px;
  color: var(--c-text-soft);
  margin-top: 6px;
}

/* Hero Banner */
.hero-banner {
  position: relative;
  background: linear-gradient(135deg, #0b2545 0%, #13315c 60%, #1e3a6a 100%);
  border-radius: var(--radius-lg);
  padding: 36px 32px 28px;
  color: #fff;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  min-height: 420px;
  display: flex;
  flex-direction: column;
}
.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(
      circle at 90% 10%,
      rgba(66, 133, 244, 0.35),
      transparent 50%
    ),
    radial-gradient(
      circle at 10% 90%,
      rgba(242, 169, 59, 0.25),
      transparent 50%
    );
}
.banner-stage {
  position: relative;
  flex: 1;
}
.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: translateY(8px);
  transition:
    opacity 0.5s ease,
    transform 0.5s ease;
  pointer-events: none;
}
.banner-slide.is-active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.slide-num {
  display: inline-block;
  font-family: var(--serif);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
}
.banner-slide h3 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 14px;
  font-weight: 600;
}
.banner-slide p {
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  margin-bottom: 20px;
  line-height: 1.75;
}
.banner-slide ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.banner-slide ul li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  padding-left: 22px;
  position: relative;
}
.banner-slide ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 12px;
  height: 2px;
  background: var(--c-accent);
}
.banner-dots {
  display: flex;
  gap: 10px;
  margin-top: 24px;
  position: relative;
}
.dot {
  width: 32px;
  height: 4px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 4px;
  transition:
    background 0.25s ease,
    width 0.25s ease;
}
.dot.is-active {
  background: var(--c-accent);
  width: 48px;
}
.dot:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* ============ Section Common ============ */
.section {
  padding: 110px 0;
  position: relative;
}
.section-services {
  background: #fff;
}
.section-advantages {
  background: var(--c-bg-deep);
  color: #fff;
}
.section-advantages .section-title {
  color: #fff;
}
.section-advantages .section-lead {
  color: rgba(255, 255, 255, 0.72);
}
.section-solutions {
  background: var(--c-bg-alt);
}
.section-process {
  background: #fff;
}
.section-about {
  background: var(--c-bg-alt);
}
.section-cases {
  background: #fff;
}
.section-faq {
  background: var(--c-bg-alt);
}
.section-contact {
  background: var(--c-bg-deep);
  color: #fff;
}
.section-contact .section-title {
  color: #fff;
}
.section-contact .section-lead {
  color: rgba(255, 255, 255, 0.72);
}

.section-head {
  max-width: 760px;
  margin: 0 auto 64px;
  text-align: center;
}
.section-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--c-accent);
  margin-bottom: 18px;
}
.section-head-light .section-kicker {
  color: var(--c-google-yellow);
}
.section-title {
  font-size: 40px;
  line-height: 1.3;
  margin-bottom: 20px;
}
.section-lead {
  font-size: 16px;
  color: var(--c-text-soft);
  line-height: 1.85;
}

/* ============ Service Grid ============ */
.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-google-blue), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: transparent;
}
.service-card:hover::before {
  transform: scaleX(1);
}
.service-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    rgba(66, 133, 244, 0.1),
    rgba(242, 169, 59, 0.08)
  );
  color: var(--c-ink);
  border-radius: 14px;
  margin-bottom: 22px;
}
.service-icon svg {
  width: 32px;
  height: 32px;
}
.service-card h3 {
  font-size: 22px;
  margin-bottom: 6px;
}
.service-en {
  font-size: 12px;
  color: var(--c-muted);
  letter-spacing: 0.16em;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.service-card p {
  color: var(--c-text-soft);
  font-size: 14.5px;
  margin-bottom: 18px;
  line-height: 1.8;
}
.service-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.service-list li {
  font-size: 13.5px;
  color: var(--c-text);
  padding-left: 18px;
  position: relative;
}
.service-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

/* ============ Advantages ============ */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.adv-card {
  padding: 32px 28px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition:
    background 0.3s ease,
    transform 0.3s ease,
    border-color 0.3s ease;
}
.adv-card:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-4px);
  border-color: rgba(242, 169, 59, 0.4);
}
.adv-num {
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 700;
  background: linear-gradient(120deg, var(--c-google-yellow), var(--c-accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}
.adv-card h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 12px;
}
.adv-card p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ============ Solutions ============ */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.solution-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 34px 32px;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(66, 133, 244, 0.3);
}
.solution-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  background: rgba(66, 133, 244, 0.1);
  color: var(--c-accent-2);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.solution-card h3 {
  font-size: 22px;
  margin-bottom: 12px;
}
.solution-card p {
  color: var(--c-text-soft);
  font-size: 14.5px;
  margin-bottom: 18px;
  line-height: 1.85;
}
.solution-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.solution-card ul li {
  font-size: 14px;
  color: var(--c-text);
  padding-left: 22px;
  position: relative;
}
.solution-card ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--c-google-green);
  font-weight: 700;
}

/* ============ Process ============ */
.process-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0;
  position: relative;
}
.process-timeline::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: var(--c-line);
}
.process-step {
  text-align: center;
  padding: 0 12px;
  position: relative;
}
.step-num {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--c-ink);
  color: var(--c-ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 22px;
  position: relative;
  z-index: 1;
  transition:
    background 0.25s ease,
    color 0.25s ease;
}
.process-step:hover .step-num {
  background: var(--c-ink);
  color: #fff;
}
.process-step h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.process-step p {
  font-size: 13.5px;
  color: var(--c-text-soft);
  line-height: 1.8;
}

/* ============ About ============ */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: center;
}
.about-photo {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--c-ink);
}
.about-photo img {
  width: 100%;
  aspect-ratio: 4/5;
  object-fit: cover;
}
.photo-caption {
  position: absolute;
  left: 24px;
  bottom: 24px;
  background: rgba(11, 37, 69, 0.78);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
}
.photo-caption strong {
  font-family: var(--serif);
  font-size: 18px;
}
.photo-caption span {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 2px;
}

.about-copy .section-kicker {
  display: block;
  margin-bottom: 18px;
}
.about-copy .section-title {
  text-align: left;
  margin-bottom: 24px;
}
.about-copy p {
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.95;
  margin-bottom: 18px;
}
.about-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}
.about-list li {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--c-line);
  font-size: 15px;
  color: var(--c-text);
}
.about-list li:last-child {
  border-bottom: none;
}
.about-list li span {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  min-width: 70px;
  letter-spacing: 0.02em;
}

/* ============ Cases ============ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.case-logo {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--c-ink), var(--c-ink-2));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 18px;
}
.case-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.1em;
  background: rgba(242, 169, 59, 0.12);
  color: #c7821b;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}
.case-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  line-height: 1.45;
}
.case-card p {
  color: var(--c-text-soft);
  font-size: 14px;
  line-height: 1.85;
  margin-bottom: 16px;
}
.case-card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px dashed var(--c-line);
}
.case-card ul li {
  font-size: 13px;
  color: var(--c-text-soft);
}
.case-card ul li::before {
  content: "· ";
  color: var(--c-accent);
  font-weight: 700;
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition:
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}
.faq-item[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(66, 133, 244, 0.3);
}
.faq-item summary {
  padding: 22px 28px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 60px;
  transition: background 0.2s ease;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  font-weight: 300;
  color: var(--c-accent-2);
  transition: transform 0.3s ease;
  font-family: var(--sans);
}
.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}
.faq-item summary:hover {
  background: rgba(66, 133, 244, 0.03);
}
.faq-item p {
  padding: 0 28px 24px;
  color: var(--c-text-soft);
  font-size: 15px;
  line-height: 1.95;
  border-top: 1px dashed var(--c-line);
  margin-top: -8px;
  padding-top: 18px;
}

/* ============ Contact ============ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  text-align: center;
  transition:
    background 0.3s ease,
    transform 0.3s ease;
}
.contact-card:hover {
  background: rgba(255, 255, 255, 0.09);
  transform: translateY(-4px);
}
.contact-card h3 {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  letter-spacing: 0.16em;
  margin-bottom: 18px;
  text-transform: uppercase;
}
.contact-line {
  display: block;
  font-family: var(--serif);
  font-size: 32px;
  font-weight: 700;
  color: #fff !important;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.contact-line:hover {
  color: var(--c-google-yellow) !important;
}
.contact-card p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}
.qr {
  width: 160px;
  height: 160px;
  margin: 0 auto 14px;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 6px;
}

/* ============ Footer ============ */
.site-footer {
  background: #071a35;
  color: rgba(255, 255, 255, 0.78);
  padding: 70px 0 30px;
  font-size: 14px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand { display: flex; flex-direction: column; gap: 18px; }
.footer-brand .brand { display: inline-flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.footer-brand .brand-name, .footer-brand .brand-suffix { color: #fff; }
.footer-brand p { color: rgba(255, 255, 255, 0.6); line-height: 1.85; max-width: 360px; }
.footer-services h4 {
  color: #fff;
  font-family: var(--serif);
  font-size: 18px;
  margin-bottom: 20px;
  font-weight: 600;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px 16px;
}
.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13.5px;
  padding: 4px 0;
  display: inline-block;
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}
.footer-links a:hover {
  color: var(--c-google-yellow);
  transform: translateX(2px);
}
.footer-bottom {
  padding-top: 26px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.85);
}
.footer-bottom a:hover {
  color: var(--c-google-yellow);
}

/* ============ Float Contact ============ */
.float-contact {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 90;
}
.float-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--c-ink);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 20px rgba(11, 37, 69, 0.3);
  transition:
    transform 0.25s ease,
    background 0.25s ease;
}
.float-btn:hover {
  background: var(--c-accent);
  transform: translateY(-3px);
  color: #fff;
}
.float-btn svg {
  width: 22px;
  height: 22px;
}
.back-top {
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}
.back-top.is-show {
  opacity: 1;
  pointer-events: auto;
}

/* ============ Scroll Reveal ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-title {
    font-size: 44px;
  }
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-timeline {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px 20px;
  }
  .process-timeline::before {
    display: none;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-links {
    grid-template-columns: repeat(3, 1fr);
  }
  .section {
    padding: 80px 0;
  }
  .section-title {
    font-size: 32px;
  }
}
@media (max-width: 768px) {
  .primary-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-inner {
    padding: 12px 20px;
  }
  .hero {
    padding: 110px 0 60px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-stats {
    gap: 24px;
  }
  .hero-stats strong {
    font-size: 28px;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 26px;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .container {
    padding: 0 20px;
  }
  .service-grid,
  .advantage-grid,
  .case-grid,
  .solution-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .process-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-links {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .contact-line {
    font-size: 26px;
  }
  .float-contact {
    right: 16px;
    bottom: 16px;
  }
  .float-btn {
    width: 42px;
    height: 42px;
  }
  .faq-item summary {
    font-size: 15px;
    padding: 18px 50px 18px 20px;
  }
  .faq-item summary::after {
    right: 20px;
  }
  .faq-item p {
    padding: 16px 20px 20px;
    font-size: 14px;
  }
  .photo-caption {
    left: 16px;
    bottom: 16px;
    padding: 10px 14px;
  }
  .photo-caption strong {
    font-size: 15px;
  }
  .photo-caption span {
    font-size: 11px;
  }
}
@media (max-width: 480px) {
  .hero-title {
    font-size: 28px;
  }
  .brand-name {
    font-size: 18px;
  }
  .brand-suffix {
    font-size: 13px;
  }
  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }
  .hero-cta {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-cta .btn {
    justify-content: center;
  }
}