:root {
  --bg: #07111f;
  --bg-soft: #0c1a2b;
  --panel: rgba(16, 31, 49, 0.82);
  --panel-strong: #11253d;
  --line: rgba(148, 180, 212, 0.16);
  --text: #e8f1fb;
  --muted: #92a7bd;
  --accent: #5eead4;
  --accent-strong: #2dd4bf;
  --accent-ink: #042f2e;
  --radius: 18px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  line-height: 1.7;
  background:
    radial-gradient(900px 600px at 12% -12%, rgba(45, 212, 191, 0.12), transparent 60%),
    radial-gradient(800px 520px at 92% 0%, rgba(59, 130, 246, 0.11), transparent 55%),
    var(--bg);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(148, 180, 212, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 180, 212, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

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

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.page {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(94, 234, 212, 0.3);
  border-radius: 10px;
  background: rgba(45, 212, 191, 0.08);
}

.brand-mark svg {
  width: 21px;
  height: 21px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-text {
  font-size: 1.02rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a {
  transition: color 0.18s ease;
}

.nav a:hover {
  color: var(--text);
}

.nav-cta {
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(17, 37, 61, 0.55);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  align-items: center;
  gap: 64px;
  padding: 84px 0 74px;
}

.eyebrow {
  margin: 0 0 15px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: clamp(2.35rem, 5vw, 4.45rem);
  line-height: 1.16;
  letter-spacing: -0.045em;
}

h1 span {
  color: var(--accent);
}

.lede {
  max-width: 610px;
  margin-bottom: 30px;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-bottom: 36px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 43px;
  padding: 10px 19px;
  border: 1px solid transparent;
  border-radius: 11px;
  font-size: 0.94rem;
  font-weight: 650;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

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

.button-primary {
  color: var(--accent-ink);
  background: var(--accent);
}

.button-primary:hover {
  background: #99f6e4;
}

.button-ghost {
  color: var(--text);
  border-color: var(--line);
  background: rgba(17, 37, 61, 0.48);
}

.button-ghost:hover {
  border-color: rgba(94, 234, 212, 0.38);
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 0;
  padding: 0;
  color: var(--muted);
  list-style: none;
  font-size: 0.82rem;
}

.trust-list li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(94, 234, 212, 0.8);
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 12% -8% -14% 10%;
  z-index: -1;
  border-radius: 50%;
  background: rgba(45, 212, 191, 0.13);
  filter: blur(50px);
}

.window {
  overflow: hidden;
  border: 1px solid rgba(148, 180, 212, 0.22);
  border-radius: 16px;
  background: linear-gradient(160deg, rgba(17, 37, 61, 0.96), rgba(8, 19, 33, 0.98));
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.window-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 13px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.window-bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3b536b;
}

.window-bar span:first-child {
  background: #f87171;
}

.window-bar span:nth-child(2) {
  background: #fbbf24;
}

.window-bar span:nth-child(3) {
  background: #34d399;
}

.window-bar em {
  margin-left: 8px;
  color: #6f859b;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-style: normal;
}

.window-body {
  min-height: 272px;
  padding: 28px 24px 24px;
  color: #b7c9db;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.83rem;
  line-height: 2.15;
}

.line {
  white-space: nowrap;
}

.prompt {
  margin-right: 9px;
  color: var(--accent);
}

.ok {
  margin-right: 8px;
  color: #34d399;
}

.muted {
  color: #657d94;
}

.cursor-block {
  display: inline-block;
  width: 7px;
  height: 14px;
  margin-left: 3px;
  vertical-align: -2px;
  background: var(--accent);
  animation: blink 1.1s steps(2, jump-none) infinite;
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.window-foot {
  display: flex;
  justify-content: space-between;
  padding: 11px 17px;
  border-top: 1px solid var(--line);
  color: #6f859b;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.7rem;
}

.section {
  padding: 78px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  max-width: 650px;
  margin-bottom: 34px;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
}

.section-head p:not(.eyebrow),
.split p:not(.eyebrow),
.login-copy p:not(.eyebrow) {
  margin-bottom: 0;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(13, 27, 46, 0.58);
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.card:hover {
  border-color: rgba(94, 234, 212, 0.28);
  background: rgba(17, 37, 61, 0.72);
  transform: translateY(-2px);
}

.card-icon {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 19px;
  border: 1px solid rgba(94, 234, 212, 0.24);
  border-radius: 9px;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.07);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 0.95rem;
}

.card h3 {
  margin-bottom: 7px;
  font-size: 1.02rem;
  letter-spacing: 0.01em;
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.8fr);
  gap: 70px;
  align-items: start;
}

.security-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.security-list li {
  display: grid;
  gap: 3px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.security-list strong {
  font-size: 0.94rem;
  font-weight: 650;
}

.security-list span {
  color: var(--muted);
  font-size: 0.86rem;
}

.status-section {
  padding-top: 0;
}

.status-card {
  padding: 28px;
  border: 1px solid rgba(94, 234, 212, 0.18);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(17, 37, 61, 0.8), rgba(8, 19, 33, 0.72));
}

.status-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 23px;
}

.status-head h2 {
  margin: 0;
  font-size: 1.05rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.12);
}

.status-ok {
  margin-left: auto;
  padding: 3px 10px;
  border: 1px solid rgba(52, 211, 153, 0.28);
  border-radius: 999px;
  color: #6ee7b7;
  font-size: 0.74rem;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.status-grid div {
  display: grid;
  gap: 3px;
}

.status-grid span {
  color: var(--muted);
  font-size: 0.78rem;
}

.status-grid strong {
  font-size: 0.92rem;
  font-weight: 600;
}

.status-note {
  margin: 24px 0 0;
  padding-top: 17px;
  border-top: 1px solid var(--line);
  color: #6f859b;
  font-size: 0.76rem;
}

.login-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.62fr);
  gap: 70px;
  align-items: start;
  padding-bottom: 100px;
}

.login-copy {
  max-width: 530px;
}

.login-card {
  display: grid;
  gap: 15px;
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 22px 60px rgba(0, 0, 0, 0.24);
}

.login-card label {
  display: grid;
  gap: 7px;
  color: #c7d7e7;
  font-size: 0.82rem;
}

.login-card input {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid rgba(148, 180, 212, 0.2);
  border-radius: 9px;
  outline: none;
  color: var(--text);
  background: rgba(7, 17, 31, 0.65);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.login-card input::placeholder {
  color: #61778d;
}

.login-card input:focus {
  border-color: rgba(94, 234, 212, 0.58);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.1);
}

.login-card .button {
  width: 100%;
  margin-top: 3px;
}

.form-message {
  margin: 0;
  padding: 10px 12px;
  border: 1px solid rgba(251, 191, 36, 0.24);
  border-radius: 8px;
  color: #fcd34d;
  background: rgba(251, 191, 36, 0.06);
  font-size: 0.8rem;
  line-height: 1.6;
}

.form-note {
  margin: 0;
  color: #6f859b;
  font-size: 0.74rem;
  text-align: center;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 27px 0 34px;
  border-top: 1px solid var(--line);
  color: #6f859b;
  font-size: 0.78rem;
}

.footer > div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 13px;
}

.footer .brand-text {
  color: #a9bfd4;
  font-size: 0.8rem;
}

.footer-sep {
  color: #3f566c;
}

.footer a:hover {
  color: var(--text);
}

/* 关于页与错误页 */
.inner-page {
  min-height: calc(100vh - 190px);
  padding: 76px 0 110px;
}

.inner-page h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: clamp(2rem, 4vw, 3.3rem);
}

.inner-page .lede {
  margin-bottom: 44px;
}

.prose {
  max-width: 760px;
}

.prose h2 {
  margin-top: 36px;
  margin-bottom: 10px;
  font-size: 1.2rem;
}

.prose p {
  color: var(--muted);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 32px;
  color: var(--accent);
  font-size: 0.9rem;
}

@media (max-width: 900px) {
  .page {
    width: min(calc(100% - 32px), var(--max));
  }

  .topbar {
    padding: 20px 0;
  }

  .nav {
    gap: 15px;
    font-size: 0.84rem;
  }

  .nav a:not(.nav-cta) {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 42px;
    padding: 58px 0 56px;
  }

  .hero-visual {
    max-width: 540px;
  }

  .section {
    padding: 58px 0;
  }

  .split,
  .login-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .status-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 17px;
  }

  .login-section {
    padding-bottom: 70px;
  }
}

@media (max-width: 560px) {
  h1 {
    font-size: 2.18rem;
  }

  .lede {
    font-size: 0.96rem;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .window-body {
    min-height: 238px;
    padding: 22px 16px;
    font-size: 0.72rem;
  }

  .window-foot {
    font-size: 0.64rem;
  }

  .status-card {
    padding: 21px;
  }

  .footer {
    flex-direction: column;
    gap: 12px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}