:root {
  --bg: #f7fbff;
  --ink: #1f3159;
  --muted: #5f7399;
  --line: #dbe7fb;
  --blue: #2f6bff;
  --blue-2: #4f8fff;
}

* { box-sizing: border-box; }
.hidden { display: none !important; }
body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% -8%, rgba(86, 156, 255, 0.2), transparent 36%),
    radial-gradient(circle at 90% 8%, rgba(72, 216, 172, 0.17), transparent 35%),
    var(--bg);
}
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid #e7efff;
}
.nav-wrap { min-height: 74px; display: flex; align-items: center; gap: 18px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 1.15rem; }
.brand img { width: 34px; height: 34px; border-radius: 9px; object-fit: cover; }
.main-nav { display: flex; gap: 20px; margin-left: 18px; }
.main-nav a { color: #324b77; text-decoration: none; font-weight: 600; font-size: 0.95rem; }
.main-nav a:hover { color: var(--blue); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.link-btn { color: #2f4470; text-decoration: none; font-weight: 600; font-size: 0.92rem; padding: 7px 10px; }
.link-button {
  border: 0;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}
.nav-user-avatar {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid #d2e1fb;
  box-shadow: 0 3px 10px rgba(56, 87, 142, 0.16);
  background: #f4f8ff;
}

.btn {
  border: 1px solid #cfe0ff;
  border-radius: 999px;
  padding: 10px 18px;
  text-decoration: none;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: .22s ease;
}
.btn.primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(120deg, var(--blue), var(--blue-2));
  box-shadow: 0 10px 20px rgba(61, 122, 255, 0.28);
}
.btn.primary:hover { transform: translateY(-1px); }
.btn.ghost { color: #2b5fc7; background: #eef4ff; }
.btn.ghost:hover { background: #e2edff; }

.hero { padding: 62px 0 50px; }
.hero-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 26px; align-items: center; }
.hero h1 { margin: 0 0 16px; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.2; }
.hero p { margin: 0; font-size: 1.1rem; line-height: 1.8; color: var(--muted); max-width: 620px; }
.hero-actions { margin-top: 24px; display: flex; gap: 12px; flex-wrap: wrap; }

.hero-visual {
  position: relative;
  min-height: 460px;
  border-radius: 24px;
  border: 0;
  box-shadow: none;
  background: transparent;
  overflow: hidden;
}
.hero-visual-img {
  width: 100%;
  height: 100%;
  min-height: 460px;
  display: block;
  object-fit: contain;
  transform: scale(1.2);
  transform-origin: center;
}

.section { padding: 58px 0; }
.section h2 { margin: 0 0 24px; font-size: clamp(1.7rem, 3vw, 2.2rem); }
.tint {
  background: linear-gradient(180deg, rgba(237, 245, 255, .9), rgba(234, 249, 243, .75));
  border-top: 1px solid #e4efff;
  border-bottom: 1px solid #e4efff;
}

.feature-grid { display: grid; gap: 16px; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.feature-card,
.adv-card,
.shot-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 10px 24px rgba(37, 82, 153, .08);
}
.feature-card { transition: transform .2s ease, box-shadow .2s ease; }
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 14px 28px rgba(37, 82, 153, .14); }
.feature-image {
  width: 100%;
  height: 92px;
  object-fit: contain;
  border-radius: 10px;
  border: 0;
  background: transparent;
  margin-bottom: 8px;
}
.feature-card h3 { margin: 2px 0 8px; font-size: 1.2rem; }
.feature-card p { margin: 0; color: var(--muted); line-height: 1.7; }

.adv-grid { display: grid; gap: 16px; grid-template-columns: repeat(3, minmax(0, 1fr)); }
.adv-card h3 { margin: 0 0 8px; }
.adv-card p { margin: 0; color: var(--muted); line-height: 1.75; }

.shots-grid { display: grid; gap: 18px; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shot-image {
  width: 100%;
  height: 320px;
  display: block;
  object-fit: cover;
  object-position: center;
  border-radius: 14px;
  border: 0;
  background: transparent;
  margin-bottom: 12px;
}

.shot-card h3 { margin: 0 0 8px; }
.shot-card p { margin: 0; color: var(--muted); }

.article-hero {
  padding: 58px 0 18px;
}
.article-shell {
  max-width: 860px;
}
.article-shell h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.18;
}
.article-lead {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.9;
}
.article-body {
  padding: 18px 0 60px;
}
.article-body .content-card {
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid #dce7fb;
  border-radius: 24px;
  padding: 28px;
  box-shadow: 0 12px 28px rgba(37, 82, 153, .08);
}
.article-body h2 {
  margin: 0 0 14px;
  font-size: 1.5rem;
}
.article-body p,
.article-body li {
  color: var(--muted);
  line-height: 1.9;
  font-size: 1rem;
}
.article-body p {
  margin: 0 0 16px;
}
.article-body ul {
  margin: 0 0 18px;
  padding-left: 22px;
}
.article-body a {
  color: #285fd2;
}
.article-jump {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 18px 0 0;
}
.article-jump a {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  text-decoration: none;
  background: #edf4ff;
  color: #2a5fc9;
  font-weight: 700;
}

.cta { padding-top: 14px; }
.cta-box {
  background: linear-gradient(130deg, #eaf2ff 0%, #e6fbf4 100%);
  border: 1px solid #d9ecff;
  border-radius: 24px;
  padding: 34px 24px;
  text-align: center;
}
.cta-box h2 { margin-bottom: 0; }

.site-footer { margin-top: 58px; border-top: 1px solid #e3edff; background: #fff; }
.footer-grid { min-height: 96px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.footer-grid h3 { margin: 0; }
.footer-grid p { margin: 6px 0 0; color: var(--muted); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: #3b5583; text-decoration: none; }

.login-modal {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: grid;
  place-items: center;
  padding: 20px;
}
.login-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 22, 40, 0.42);
}
.login-modal-card {
  position: relative;
  z-index: 1;
  width: min(420px, calc(100vw - 28px));
  border-radius: 16px;
  border: 1px solid #d4e4ff;
  background: #ffffff;
  box-shadow: 0 18px 40px rgba(29, 58, 110, 0.22);
  padding: 20px;
}
.login-modal-card h3 {
  margin: 0 0 12px;
  font-size: 1.35rem;
}
.trial-notice-card p {
  margin: 0;
  color: #435b86;
  line-height: 1.8;
}
.landing-login-form {
  display: grid;
  gap: 10px;
}
.landing-login-form label {
  display: grid;
  gap: 6px;
  color: #3f5580;
  font-weight: 600;
}
.landing-login-form input {
  width: 100%;
  border: 1px solid #cfddf7;
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
  font-size: .96rem;
}
.landing-login-form input:focus {
  border-color: #7ba9ff;
  box-shadow: 0 0 0 3px rgba(89, 145, 255, 0.16);
}
.landing-login-actions {
  margin-top: 8px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}
.login-error {
  margin: 0;
  color: #d94866;
  font-size: .9rem;
}

@media (max-width: 980px) {
  .main-nav { display: none; }
  .hero-grid,
  .shots-grid,
  .feature-grid,
  .adv-grid { grid-template-columns: 1fr; }
  .hero-visual { min-height: 330px; }
  .hero-visual-img {
    min-height: 330px;
    transform: scale(1.1);
  }
}

@media (max-width: 720px) {
  .container { width: min(1160px, calc(100% - 24px)); }
  .nav-wrap { min-height: 64px; }
  .brand span { font-size: 1rem; }
  .nav-actions .link-btn { display: none; }
  .hero { padding-top: 36px; }
}