/* =====================================================================
   汉行 Hanxing · 商用卫星发射服务
   纯手工 CSS — 深空暗色主题 / 玻璃拟态 / 响应式
   不依赖任何外部网络资源（含字体），离线可用。
   ===================================================================== */

:root {
  --bg-0: #05070f;
  --bg-1: #0a1024;
  --cyan: #22d3ee;
  --sky: #38bdf8;
  --gold: #f5c451;
  --text: #e7eefc;
  --muted: #9fb0d0;
  --glass: rgba(255, 255, 255, 0.04);
  --glass-strong: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(120, 180, 255, 0.16);
  --maxw: 1180px;
  --radius: 18px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui,
    -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  background:
    radial-gradient(1200px 620px at 82% -12%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(900px 520px at 8% 8%, rgba(56, 189, 248, 0.08), transparent 62%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 100%);
  background-attachment: fixed;
}

a {
  color: inherit;
}

img,
svg {
  display: block;
}

/* ----------------------------- 导航栏 ----------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(8, 12, 26, 0.55);
  border-bottom: 1px solid rgba(120, 180, 255, 0.10);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav.is-scrolled {
  background: rgba(8, 12, 26, 0.82);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35);
}

.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 22px;
}

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 800;
  letter-spacing: 1px;
  font-size: 19px;
  color: #fff;
  text-decoration: none;
  white-space: nowrap;
}

.nav__logo .logo-mark {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #fff, var(--gold) 60%, #b9881f);
  box-shadow: 0 0 12px rgba(245, 196, 81, 0.7);
}

.nav__links {
  display: flex;
  gap: 24px;
  margin-left: auto;
  align-items: center;
}

.nav__links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14.5px;
  letter-spacing: 0.5px;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s ease;
}

.nav__links a:hover,
.nav__links a.is-active {
  color: #fff;
}

.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  transition: width 0.25s ease;
}

.nav__links a:hover::after,
.nav__links a.is-active::after {
  width: 100%;
}

.lang-toggle {
  margin-left: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 6px 13px;
  color: var(--muted);
  font-size: 13px;
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
  font-family: inherit;
}

.lang-toggle:hover {
  border-color: rgba(56, 189, 248, 0.45);
}

.lang-toggle span {
  padding: 0 2px;
  transition: color 0.2s ease;
  user-select: none;
}

.lang-toggle span.active {
  color: #fff;
  font-weight: 700;
}

.lang-toggle .sep {
  opacity: 0.4;
  font-weight: 400;
}

.nav__menu-btn {
  display: none;
  margin-left: 12px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: #fff;
  width: 40px;
  height: 38px;
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

/* ----------------------------- Hero ----------------------------- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--bg-0);
  background-image:
    linear-gradient(90deg, rgba(5, 7, 15, 0.92) 0%, rgba(5, 7, 15, 0.58) 42%, rgba(5, 7, 15, 0.22) 74%, rgba(5, 7, 15, 0.38) 100%),
    linear-gradient(180deg, rgba(5, 7, 15, 0.45) 0%, rgba(5, 7, 15, 0.12) 42%, rgba(5, 7, 15, 0.62) 100%),
    url("../img/hero.png");
  background-size: cover;
  background-position: center right;
  background-repeat: no-repeat;
}

#starfield {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 1;
  opacity: 0.78;
  pointer-events: none;
}

/* ----------------------- 文件字段提示 ----------------------- */
.field__hint {
  display: block;
  color: rgba(159, 176, 208, 0.6);
  font-size: 12px;
  margin-top: 6px;
}

/* ----------------------- 全球航线视觉带 ----------------------- */
.route-band {
  padding: 78px 0;
  position: relative;
}

.route-band .section__head {
  margin-bottom: 36px;
}

.route-band__visual {
  max-width: 1100px;
  margin: 0 auto;
}

.route-band__img {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 12px 40px rgba(8, 16, 36, 0.6));
}

.route-band__caption {
  text-align: center;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  max-width: 760px;
  margin: 28px auto 0;
}

.hero__inner {
  position: relative;
  z-index: 3;
  max-width: var(--maxw);
  width: 100%;
  margin: 0 auto;
  padding: 96px 22px;
}

.hero__content {
  max-width: 780px;
}

.eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 12px;
  font-weight: 600;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 12.5px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.35);
  border-radius: 999px;
  padding: 6px 15px;
  background: rgba(34, 211, 238, 0.07);
  margin-bottom: 24px;
}

.hero__title {
  font-size: clamp(30px, 5vw, 56px);
  line-height: 1.16;
  letter-spacing: 1px;
  font-weight: 800;
  background: linear-gradient(120deg, #ffffff 0%, #bfe9ff 55%, #7fd8ee 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 22px;
}

.hero__subtitle {
  font-size: 17px;
  color: var(--muted);
  max-width: 700px;
  margin-bottom: 34px;
}

.hero__actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  letter-spacing: 0.5px;
  transition: transform 0.2s ease, box-shadow 0.25s ease, background 0.25s ease;
  border: 1px solid transparent;
}

.btn--primary {
  background: linear-gradient(120deg, var(--cyan), var(--sky));
  color: #02121a;
  box-shadow: 0 10px 30px rgba(34, 211, 238, 0.28);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 40px rgba(34, 211, 238, 0.42);
}

.btn--ghost {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: #fff;
}

.btn--ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(56, 189, 248, 0.5);
  box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

/* 卫星轨道（纯 CSS 动画） */
.hero__orbit {
  position: absolute;
  right: -80px;
  top: 50%;
  transform: translateY(-50%);
  width: 540px;
  height: 540px;
  z-index: 1;
  pointer-events: none;
}

.orbit-ring {
  position: absolute;
  inset: 0;
  border: 1px solid rgba(120, 200, 255, 0.26);
  border-radius: 50%;
  box-shadow: inset 0 0 34px rgba(56, 189, 248, 0.08);
}

.orbit-ring--inner {
  inset: 90px;
  border-color: rgba(120, 200, 255, 0.16);
}

.orbit-arm {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 270px;
  height: 0;
  transform-origin: left center;
  animation: orbit 28s linear infinite;
}

.orbit-sat {
  position: absolute;
  right: -36px;
  top: -36px;
  width: 72px;
  height: 72px;
  filter: drop-shadow(0 0 22px rgba(56, 189, 248, 0.95));
  animation: orbit-counter 28s linear infinite;
}

.orbit-sat__glow {
  animation: sat-pulse 2.4s ease-in-out infinite;
}

@keyframes orbit {
  to { transform: rotate(360deg); }
}

@keyframes orbit-counter {
  to { transform: rotate(-360deg); }
}

@keyframes sat-pulse {
  0%, 100% { opacity: 0.55; transform: scale(0.92); }
  50% { opacity: 1; transform: scale(1.08); }
}

/* ----------------------------- 数据条 ----------------------------- */
.stats {
  padding: 26px 0 6px;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

.stat {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 26px 18px;
  text-align: center;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.stat__value {
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
  background: linear-gradient(120deg, #fff, var(--cyan));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat__label {
  color: var(--muted);
  font-size: 13.5px;
  margin-top: 8px;
}

/* --------------------------- 通用区块 --------------------------- */
.section {
  padding: 86px 0;
  position: relative;
}

.section__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
}

.section__head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 46px;
}

.section__title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 800;
  letter-spacing: 1px;
  margin: 12px 0 12px;
  color: #fff;
}

.section__subtitle {
  color: var(--muted);
  font-size: 15.5px;
}

.divider {
  height: 1px;
  max-width: var(--maxw);
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.55), transparent);
}

/* ----------------------------- 卡片 ----------------------------- */
.grid {
  display: grid;
  gap: 22px;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid--auto {
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 26px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(56, 189, 248, 0.45);
  box-shadow: 0 16px 54px rgba(34, 211, 238, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.card__title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.card__desc {
  color: var(--muted);
  font-size: 14.5px;
}

.service-card__icon {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(34, 211, 238, 0.18), rgba(245, 196, 81, 0.12));
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--cyan);
  margin-bottom: 18px;
}

.service-card__icon svg {
  width: 26px;
  height: 26px;
}

/* ----------------------------- 流程 ----------------------------- */
.process__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.step {
  position: relative;
  padding: 46px 16px 22px;
  border-radius: 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow: hidden;
}

.step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold));
  opacity: 0.85;
}

.step__node {
  position: absolute;
  top: 18px;
  left: 16px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan);
}

.step__num {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(120deg, var(--cyan), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.step__title {
  color: #fff;
  font-weight: 700;
  margin: 10px 0 8px;
  font-size: 15.5px;
}

.step__desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

/* ----------------------------- 运力 ----------------------------- */
.capacity__note {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  max-width: 720px;
  margin: -26px auto 40px;
}

.cap-badge {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--gold);
  border: 1px solid rgba(245, 196, 81, 0.4);
  border-radius: 999px;
  padding: 2px 9px;
  margin-bottom: 14px;
  background: rgba(245, 196, 81, 0.07);
}

.cap-card__name {
  font-size: 16.5px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.45;
}

.cap-card__desc {
  color: var(--muted);
  font-size: 14px;
}

/* ----------------------------- 关于 ----------------------------- */
.about__brand {
  max-width: 820px;
  margin: 0 auto 44px;
  text-align: center;
  font-size: 17px;
  color: #d7e2f7;
  line-height: 1.9;
}

.compliance {
  max-width: 880px;
  margin: 50px auto 0;
  text-align: center;
  padding: 26px 28px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.08), rgba(245, 196, 81, 0.05));
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.compliance h3 {
  color: var(--gold);
  font-size: 17px;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.compliance p {
  color: var(--muted);
  font-size: 14.5px;
}

/* ----------------------------- 联系 ----------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 30px;
  align-items: start;
}

.form {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 7px;
}

.field input,
.field textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  padding: 11px 13px;
  color: #fff;
  font-family: inherit;
  font-size: 14.5px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input::placeholder,
.field textarea::placeholder {
  color: rgba(159, 176, 208, 0.45);
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

.field textarea {
  resize: vertical;
  min-height: 110px;
}

.field--invalid input,
.field--invalid textarea {
  border-color: #ff8a8a;
}

.field__error {
  display: block;
  color: #ff9a9a;
  font-size: 12.5px;
  margin-top: 5px;
  min-height: 1em;
}

.form__success {
  margin-top: 16px;
  padding: 13px 15px;
  border-radius: 10px;
  background: rgba(34, 211, 238, 0.10);
  border: 1px solid rgba(34, 211, 238, 0.35);
  color: #bdf3ff;
  font-size: 14px;
  display: none;
}

.form__success.is-visible {
  display: block;
}

.contact__aside {
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.09), rgba(245, 196, 81, 0.05));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 30px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: sticky;
  top: 96px;
}

.contact__aside h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 14px;
}

.contact__aside p {
  color: var(--muted);
  font-size: 14.5px;
}

.contact__aside .aside-mail {
  margin-top: 18px;
  font-size: 13.5px;
  color: var(--cyan);
  word-break: break-all;
}

/* ----------------------------- 页脚 ----------------------------- */
.footer {
  padding: 38px 0 54px;
  border-top: 1px solid rgba(120, 180, 255, 0.10);
  margin-top: 40px;
}

.footer__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 22px;
  text-align: center;
}

.footer__text {
  color: var(--muted);
  font-size: 14px;
}

.footer__disclaimer {
  color: rgba(159, 176, 208, 0.55);
  font-size: 12.5px;
  margin-top: 10px;
}

.footer__icp {
  margin-top: 10px;
  font-size: 12.5px;
}

.footer__icp a {
  color: rgba(159, 176, 208, 0.7);
  text-decoration: none;
}

.footer__icp a:hover {
  color: var(--cyan);
}

/* --------------------------- 滚动渐显 --------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* --------------------------- 响应式 --------------------------- */
@media (max-width: 960px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .process__grid { grid-template-columns: repeat(3, 1fr); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; }
  .contact__aside { position: static; }
  .hero__orbit { opacity: 0.45; right: -180px; width: 440px; height: 440px; }
}

@media (max-width: 640px) {
  .nav__links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(8, 12, 26, 0.98);
    border-bottom: 1px solid rgba(120, 180, 255, 0.14);
    padding: 6px 0;
    display: none;
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: 13px 22px; }
  .nav__links a::after { display: none; }
  .nav__menu-btn { display: inline-flex; }
  .grid--3,
  .process__grid,
  .stats__grid { grid-template-columns: 1fr; }
  .hero__orbit { display: none; }
  .hero {
    min-height: auto;
    background-image:
      linear-gradient(180deg, rgba(5, 7, 15, 0.82) 0%, rgba(5, 7, 15, 0.66) 48%, rgba(5, 7, 15, 0.88) 100%),
      url("../img/hero.png");
    background-position: center;
  }
  .hero__inner { padding: 64px 20px 72px; }
  .section { padding: 64px 0; }
  .stats { padding-top: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .orbit-arm, .orbit-sat { animation: none; }
  html { scroll-behavior: auto; }
}