:root {
  --bg: #0f1c24;
  --bg-soft: #152833;
  --ink: #e8eef2;
  --muted: #9bb0bc;
  --accent: #2bb8a9;
  --accent-deep: #1a8f83;
  --line: rgba(232, 238, 242, 0.12);
  --font-display: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container: 1080px;
  --radius: 2px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(100% - 2.5rem, var(--container));
  margin-inline: auto;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(15, 28, 36, 0.78);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header:hover {
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand-mark {
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50% 50% 50% 8%;
  background: linear-gradient(135deg, var(--accent), #7ad7c8);
  transform: rotate(-18deg);
  box-shadow: 0 0 0 4px rgba(43, 184, 169, 0.15);
}

.brand-text {
  font-size: 1.08rem;
}

.nav {
  display: flex;
  gap: 1.65rem;
  font-size: 0.94rem;
}

.nav a {
  position: relative;
  color: var(--muted);
  transition: color 0.2s ease;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.35rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav a:hover,
.nav a:focus-visible,
.nav a[aria-current="page"] {
  color: var(--ink);
}

.nav a:hover::after,
.nav a:focus-visible::after,
.nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

/* QQ 登录：清晰企鹅图标 +「QQ登录」文字 */
.btn-qq {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.95rem;
  border-radius: 6px;
  background: #12b7f5;
  color: #fff !important;
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.2;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.18) inset;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-qq img {
  display: block;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 50%;
  object-fit: contain;
  background: #fff;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.btn-qq:hover,
.btn-qq:focus-visible {
  background: #0ea2db;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(18, 183, 245, 0.35);
}

.btn-qq-lg {
  padding: 0.9rem 1.5rem;
  font-size: 1.05rem;
  gap: 0.65rem;
  border-radius: 8px;
}

.btn-qq-lg img {
  width: 26px;
  height: 26px;
}

.nav .btn-qq::after {
  display: none;
}

.login-box {
  max-width: 420px;
  margin: 0 auto;
  padding: 2rem 1.75rem;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(18, 183, 245, 0.08), transparent 55%), var(--bg-soft);
  text-align: center;
}

.login-box h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
}

.login-desc {
  color: var(--muted);
  margin: 0 0 1.5rem;
}

.login-note {
  margin: 1.25rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 70% 55% at 78% 32%, rgba(43, 184, 169, 0.32), transparent 62%),
    radial-gradient(ellipse 48% 42% at 12% 78%, rgba(26, 143, 131, 0.2), transparent 58%),
    radial-gradient(ellipse 40% 30% at 45% 10%, rgba(122, 215, 200, 0.08), transparent 70%),
    linear-gradient(165deg, #0a141a 0%, #132430 42%, #0f1c24 100%);
}

.hero-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(232, 238, 242, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(232, 238, 242, 0.04) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.55), transparent 88%);
  animation: drift 28s linear infinite;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.hero-orb-a {
  width: min(42vw, 420px);
  aspect-ratio: 1;
  right: 8%;
  top: 16%;
  background: radial-gradient(circle, rgba(43, 184, 169, 0.35), transparent 68%);
  animation: float-a 9s ease-in-out infinite;
}

.hero-orb-b {
  width: min(28vw, 260px);
  aspect-ratio: 1;
  right: 28%;
  bottom: 18%;
  background: radial-gradient(circle, rgba(122, 215, 200, 0.18), transparent 70%);
  animation: float-b 11s ease-in-out infinite;
}

.hero-ring {
  position: absolute;
  width: min(52vw, 520px);
  aspect-ratio: 1;
  right: -6%;
  top: 16%;
  border-radius: 50%;
  border: 1px solid rgba(43, 184, 169, 0.28);
  box-shadow:
    0 0 0 28px rgba(43, 184, 169, 0.045),
    inset 0 0 70px rgba(43, 184, 169, 0.08);
  animation: pulse 6s ease-in-out infinite;
}

.hero-ring::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px dashed rgba(43, 184, 169, 0.16);
  animation: spin-slow 48s linear infinite;
}

.hero-content {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

.brand-hero,
.hero h1,
.hero-lead,
.hero-actions {
  animation: rise 0.9s ease both;
}

.hero h1 {
  animation-delay: 0.1s;
}

.hero-lead {
  animation-delay: 0.2s;
}

.hero-actions {
  animation-delay: 0.3s;
}

.brand-hero {
  margin: 0 0 1rem;
  font-family: var(--font-body);
  font-size: 0.82rem;
  letter-spacing: 0.32em;
  color: var(--accent);
  font-weight: 500;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(3rem, 9vw, 5.6rem);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.08;
  background: linear-gradient(120deg, #f3f8fa 20%, #9fd9d0 85%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  margin: 1.4rem 0 0;
  max-width: 30rem;
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 1.8rem;
  transform: translateX(-50%);
  width: 1.5rem;
  height: 2.35rem;
  border: 1px solid rgba(232, 238, 242, 0.22);
  border-radius: 999px;
  display: grid;
  place-items: start center;
  padding-top: 0.45rem;
  opacity: 0.75;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.hero-scroll:hover {
  opacity: 1;
  border-color: rgba(43, 184, 169, 0.5);
}

.hero-scroll span {
  width: 0.28rem;
  height: 0.28rem;
  border-radius: 50%;
  background: var(--accent);
  animation: scroll-dot 1.8s ease-in-out infinite;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0 1.45rem;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: #06201d;
  font-weight: 700;
  box-shadow: 0 8px 28px rgba(43, 184, 169, 0.22);
}

.btn-primary:hover {
  background: #3dcfbf;
  box-shadow: 0 10px 32px rgba(43, 184, 169, 0.3);
}

.btn-ghost {
  border-color: var(--line);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.02);
}

.btn-ghost:hover {
  border-color: rgba(43, 184, 169, 0.45);
  background: rgba(43, 184, 169, 0.06);
}

.section {
  padding: 6rem 0;
  position: relative;
}

.section-alt {
  background:
    linear-gradient(180deg, rgba(21, 40, 51, 0.72), rgba(15, 28, 36, 0.25));
  border-block: 1px solid var(--line);
}

.section-eyebrow {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.28em;
  color: var(--accent);
  font-weight: 500;
}

.section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 3.2vw, 2.35rem);
  letter-spacing: 0.08em;
  font-weight: 700;
}

.section-lead {
  margin: 1rem 0 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.section-more {
  margin: 2.4rem 0 0;
}

.page-hero {
  padding: 7.5rem 0 3.5rem;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(ellipse 55% 70% at 85% 20%, rgba(43, 184, 169, 0.18), transparent 60%),
    linear-gradient(165deg, #0c171e 0%, #132430 55%, #0f1c24 100%);
}

.page-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1.2;
}

.page-lead {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.prose {
  max-width: 42rem;
}

.prose h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: 0.06em;
}

.prose p {
  margin: 1rem 0 0;
  color: var(--muted);
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.prose a:hover {
  color: #3dcfbf;
}

.prose ul {
  margin: 0.75rem 0 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.prose li {
  margin: 0.35rem 0;
}

.info-list,
.service-detail-list {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.info-list li {
  display: grid;
  grid-template-columns: 9rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.info-list span:first-child {
  color: var(--muted);
  font-size: 0.92rem;
}

.service-detail-list li {
  display: grid;
  gap: 0.35rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--line);
}

.service-detail-list strong {
  font-size: 1.05rem;
  letter-spacing: 0.03em;
}

.service-detail-list span {
  color: var(--muted);
  font-size: 0.98rem;
}

.about-grid,
.services-grid,
.explore-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 2.75rem;
}

.about-grid article,
.services-grid article {
  padding: 1.5rem 0 1.5rem 1.35rem;
  border: 0;
  border-left: 1px solid rgba(43, 184, 169, 0.28);
  background: transparent;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.about-grid article:hover,
.services-grid article:hover {
  border-left-color: var(--accent);
  transform: translateX(3px);
}

.about-grid h3,
.services-grid h3 {
  margin: 0 0 0.7rem;
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.about-grid h3::before,
.services-grid h3::before {
  content: "";
  display: block;
  width: 1.5rem;
  height: 2px;
  margin-bottom: 0.95rem;
  background: var(--accent);
}

.about-grid p,
.services-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.section-explore {
  border-top: 1px solid var(--line);
  background:
    radial-gradient(ellipse 55% 50% at 100% 0%, rgba(43, 184, 169, 0.1), transparent 55%),
    linear-gradient(180deg, rgba(21, 40, 51, 0.35), transparent 70%);
}

.explore-link {
  display: block;
  padding: 1.6rem 0 1.6rem 1.35rem;
  border-left: 1px solid rgba(43, 184, 169, 0.28);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.explore-link:hover,
.explore-link:focus-visible {
  border-left-color: var(--accent);
  transform: translateX(4px);
}

.explore-label {
  display: block;
  margin-bottom: 1rem;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.explore-link h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.explore-link p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  max-width: 16rem;
}

.pay-panel {
  max-width: 28rem;
}

.pay-form {
  display: grid;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.pay-form label {
  display: grid;
  gap: 0.45rem;
}

.pay-form label span {
  color: var(--muted);
  font-size: 0.92rem;
}

.pay-form input {
  width: 100%;
  min-height: 2.75rem;
  padding: 0 0.9rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
  font: inherit;
}

.pay-form input:focus {
  outline: none;
  border-color: rgba(43, 184, 169, 0.55);
}

.pay-form .btn {
  justify-self: start;
  margin-top: 0.35rem;
  cursor: pointer;
}

.pay-hint {
  margin: 1.75rem 0 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

.pay-status {
  margin: 0 0 1.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.98rem;
}

.pay-status.is-ok {
  color: var(--accent);
}

.pay-status.is-bad {
  color: #e8a0a0;
}

.contact-block {
  max-width: 40rem;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.contact-list li {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 1.05rem 0;
  border-bottom: 1px solid var(--line);
}

.contact-list li:first-child {
  border-top: 1px solid var(--line);
}

.contact-list span {
  color: var(--muted);
  font-size: 0.92rem;
}

.contact-list li > span:last-child,
.contact-list a {
  color: var(--ink);
  font-size: 0.98rem;
}

.contact-list a {
  transition: color 0.2s ease;
}

.contact-list a:hover {
  color: var(--accent);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.7rem 0 2.1rem;
  background: #0c171e;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  justify-content: space-between;
  align-items: center;
}

.copyright,
.beian {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.beian a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.beian a:hover {
  color: var(--accent);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes drift {
  from {
    transform: translate3d(0, 0, 0);
  }
  to {
    transform: translate3d(-72px, -36px, 0);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
    opacity: 0.85;
  }
  50% {
    transform: scale(1.04);
    opacity: 1;
  }
}

@keyframes float-a {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(-18px, 22px, 0);
  }
}

@keyframes float-b {
  0%,
  100% {
    transform: translate3d(0, 0, 0);
  }
  50% {
    transform: translate3d(14px, -16px, 0);
  }
}

@keyframes spin-slow {
  to {
    transform: rotate(360deg);
  }
}

@keyframes scroll-dot {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  70% {
    transform: translateY(12px);
    opacity: 0.2;
  }
  100% {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 860px) {
  .about-grid,
  .services-grid,
  .explore-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .nav {
    gap: 1rem;
    font-size: 0.88rem;
  }

  .hero-orb-a,
  .hero-ring {
    opacity: 0.7;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 1.5rem, var(--container));
  }

  .nav {
    gap: 0.75rem;
    font-size: 0.8rem;
  }

  .hero h1 {
    letter-spacing: 0.08em;
  }

  .hero-scroll {
    display: none;
  }

  .contact-list li,
  .info-list li {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .page-hero {
    padding-top: 6.5rem;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .about-grid article,
  .services-grid article {
    padding-left: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .brand-hero,
  .hero h1,
  .hero-lead,
  .hero-actions,
  .hero-bg::before,
  .hero-ring,
  .hero-ring::before,
  .hero-orb,
  .hero-scroll span {
    animation: none;
  }

  .btn:hover,
  .about-grid article:hover,
  .services-grid article:hover,
  .explore-link:hover {
    transform: none;
  }
}