/* ============================================
   Golden Software 中文官网 - 公共样式
   主题色: #334D64 (深蓝灰)  #FFBA00 (金黄)
============================================ */

/* ---------- 重置 & 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --gs-primary: #334d64;
  --gs-primary-dark: #22364a;
  --gs-primary-light: #4a6f8f;
  --gs-accent: #ffba00;
  --gs-accent-dark: #e6a800;
  --gs-text: #1f2a36;
  --gs-text-soft: #54657a;
  --gs-muted: #8a98a8;
  --gs-bg: #ffffff;
  --gs-bg-soft: #f5f8fb;
  --gs-bg-soft-2: #eef3f8;
  --gs-border: #e2e8ef;
  --gs-shadow-sm: 0 2px 8px rgba(51, 77, 100, 0.06);
  --gs-shadow-md: 0 8px 24px rgba(51, 77, 100, 0.10);
  --gs-shadow-lg: 0 20px 50px rgba(51, 77, 100, 0.14);
  --gs-radius-sm: 6px;
  --gs-radius-md: 12px;
  --gs-radius-lg: 20px;
  --gs-radius-pill: 999px;
  --gs-container: 1200px;
  --gs-font: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--gs-font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--gs-text);
  background: var(--gs-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

ul,
ol {
  list-style: none;
}

.gs-container {
  width: 100%;
  max-width: var(--gs-container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 通用按钮 ---------- */
.gs-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--gs-radius-pill);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.2px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}

.gs-btn-primary {
  background: var(--gs-accent);
  color: #1d1d1d;
  box-shadow: 0 8px 18px rgba(255, 186, 0, 0.35);
}

.gs-btn-primary:hover {
  background: var(--gs-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(255, 186, 0, 0.45);
}

.gs-btn-ghost {
  background: transparent;
  color: var(--gs-primary);
  border: 1.5px solid rgba(51, 77, 100, 0.25);
}

.gs-btn-ghost:hover {
  border-color: var(--gs-primary);
  color: var(--gs-primary);
  background: rgba(51, 77, 100, 0.05);
}

.gs-btn-light {
  background: #fff;
  color: var(--gs-primary);
  box-shadow: var(--gs-shadow-sm);
}

.gs-btn-light:hover {
  transform: translateY(-2px);
  box-shadow: var(--gs-shadow-md);
}

/* ---------- 通用版块标题 ---------- */
.gs-section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--gs-accent-dark);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.gs-section-title {
  font-size: 36px;
  line-height: 1.25;
  font-weight: 700;
  color: var(--gs-primary);
  margin-bottom: 16px;
}

.gs-section-sub {
  font-size: 17px;
  color: var(--gs-text-soft);
  max-width: 720px;
  margin: 0 auto;
}

/* ============================================
   Getting-Started 入门指南入口横幅（可复用）
============================================ */
.gs-guide-banner {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 22px;
  padding: 22px 28px;
  margin: 40px auto;
  max-width: 1100px;
  background:
    radial-gradient(420px 260px at 100% 0%, rgba(255, 186, 0, 0.18), transparent 60%),
    linear-gradient(135deg, #ffffff 0%, #f7fafd 100%);
  border: 1px solid var(--gs-border);
  border-radius: 18px;
  box-shadow: 0 14px 40px -24px rgba(51, 77, 100, 0.35);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.gs-guide-banner:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 186, 0, 0.55);
  box-shadow: 0 24px 50px -24px rgba(51, 77, 100, 0.45);
}
.gs-guide-banner .gs-guide-icon {
  width: 56px; height: 56px;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--gs-accent) 0%, var(--gs-accent-dark) 100%);
  border-radius: 14px;
  color: #1d1d1d;
  box-shadow: 0 8px 20px -6px rgba(255, 186, 0, 0.5);
  flex-shrink: 0;
}
.gs-guide-banner .gs-guide-icon svg { width: 28px; height: 28px; }
.gs-guide-banner .gs-guide-text {
  min-width: 0;
}
.gs-guide-banner .eyebrow {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--gs-accent-dark);
  margin-bottom: 4px;
}
.gs-guide-banner h3 {
  margin: 0 0 6px;
  font-size: 18px; font-weight: 800; color: var(--gs-primary);
  line-height: 1.35;
}
.gs-guide-banner p {
  margin: 0;
  font-size: 14px; color: var(--gs-text-soft);
  line-height: 1.6;
}
.gs-guide-banner .gs-guide-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px;
  font-size: 14px; font-weight: 700;
  color: #1d1d1d;
  background: var(--gs-accent);
  border-radius: 999px;
  box-shadow: 0 6px 16px -4px rgba(255, 186, 0, 0.5);
  white-space: nowrap;
  transition: background 0.2s ease, transform 0.2s ease;
}
.gs-guide-banner:hover .gs-guide-arrow {
  background: var(--gs-accent-dark);
  transform: translateX(2px);
}
@media (max-width: 720px) {
  .gs-guide-banner { grid-template-columns: auto 1fr; padding: 20px; }
  .gs-guide-banner .gs-guide-arrow { grid-column: 1 / -1; justify-content: center; }
}

/* ============================================
   导航 Header
============================================ */
.gs-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(51, 77, 100, 0.08);
}

.gs-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}

.gs-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.gs-logo img {
  height: 40px;
  width: auto;
}

/* 双 logo 品牌锁标 ─ Surfer & Grapher · by Golden Software */
.gs-brand {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 6px 4px;
  border-radius: 14px;
}

.gs-brand-marks {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding-right: 16px;
  border-right: 1px solid rgba(51, 77, 100, 0.14);
}

.gs-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  text-decoration: none;
  outline: none;
  transition: transform 0.25s ease;
}
.gs-brand-mark:focus-visible { outline: 2px solid var(--gs-accent); outline-offset: 4px; border-radius: 4px; }
.gs-brand-mark img {
  height: 100%;
  width: auto;
  display: block;
  filter: drop-shadow(0 2px 4px rgba(51, 77, 100, 0.08));
  transition: transform 0.25s ease, filter 0.25s ease;
}
.gs-brand-mark:hover img { transform: scale(1.06); filter: drop-shadow(0 4px 8px rgba(51, 77, 100, 0.18)); }
.gs-brand-mark[data-product="surfer"]:hover { transform: translateX(-1px); }
.gs-brand-mark[data-product="grapher"]:hover { transform: translateX(1px); }

.gs-brand-divider {
  position: relative;
  width: 1px;
  height: 28px;
  background: linear-gradient(
    to bottom,
    rgba(51, 77, 100, 0) 0%,
    rgba(51, 77, 100, 0.22) 50%,
    rgba(51, 77, 100, 0) 100%
  );
}
.gs-brand-dot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gs-accent);
  transform: translate(-50%, -50%);
  box-shadow: 0 0 0 3px rgba(255, 186, 0, 0.18);
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.gs-brand:hover .gs-brand-dot {
  background: var(--gs-accent-dark);
  box-shadow: 0 0 0 5px rgba(255, 186, 0, 0.28);
}

.gs-brand-word {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  line-height: 1.15;
  text-decoration: none;
  color: inherit;
  transition: transform 0.25s ease;
}
.gs-brand-word:hover { transform: translateY(-1px); }
.gs-brand-word:hover .gs-brand-title { color: var(--gs-primary); }
.gs-brand-title {
  font-family: var(--gs-font-display, "Inter", "PingFang SC", "Microsoft YaHei", sans-serif);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.2px;
  color: var(--gs-primary);
  white-space: nowrap;
}
.gs-brand-title em {
  font-style: normal;
  font-weight: 600;
  margin: 0 4px;
  color: var(--gs-accent-dark);
}
.gs-brand-by {
  margin-top: 3px;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.7px;
  text-transform: uppercase;
  color: var(--gs-muted, #6b7a87);
  white-space: nowrap;
}
.gs-brand-by strong {
  font-weight: 700;
  color: var(--gs-text-soft, #334d64);
}

@media (max-width: 980px) {
  .gs-brand-word { display: none; }
  .gs-brand-marks { padding-right: 0; border-right: 0; }
}
@media (max-width: 480px) {
  .gs-brand-marks { gap: 10px; }
  .gs-brand-mark { height: 32px; }
}

.gs-nav-menu {
  display: flex;
  align-items: stretch;
  gap: 6px;
  flex: 1;
  justify-content: center;
  height: 100%;
  margin: 0;
  padding: 0;
  list-style: none;
}
.gs-nav-menu li { display: flex; align-items: center; }

.gs-nav-menu a {
  position: relative;
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 14px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1;
  color: var(--gs-text);
  border-radius: 8px;
}

.gs-nav-menu a::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -2px;
  height: 2px;
  background: var(--gs-accent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

.gs-nav-menu a:hover {
  color: var(--gs-primary);
}

.gs-nav-menu a:hover::after {
  transform: scaleX(1);
}

.gs-nav-menu a.is-active {
  color: var(--gs-primary);
  font-weight: 600;
}
.gs-nav-menu a.is-active::after {
  transform: scaleX(1);
  background: var(--gs-accent);
}

.gs-nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gs-nav-trial {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--gs-text-soft);
  border-radius: var(--gs-radius-pill);
  border: 1px solid var(--gs-border);
  transition: all 0.2s ease;
}

.gs-nav-trial:hover {
  color: var(--gs-primary);
  border-color: var(--gs-primary);
  background: rgba(51, 77, 100, 0.04);
}

.gs-nav-buy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 700;
  color: #1d1d1d;
  background: var(--gs-accent);
  border-radius: var(--gs-radius-pill);
  box-shadow: 0 6px 16px rgba(255, 186, 0, 0.35);
  transition: all 0.2s ease;
}

.gs-nav-buy:hover {
  background: var(--gs-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(255, 186, 0, 0.45);
}

.gs-nav-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.gs-hamburger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  background: transparent;
}

.gs-hamburger span {
  position: relative;
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gs-primary);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.gs-hamburger span::before,
.gs-hamburger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--gs-primary);
  transition: transform 0.25s ease;
}

.gs-hamburger span::before {
  top: -7px;
}

.gs-hamburger span::after {
  top: 7px;
}

.gs-hamburger.is-open span {
  background: transparent;
}

.gs-hamburger.is-open span::before {
  transform: translateY(7px) rotate(45deg);
}

.gs-hamburger.is-open span::after {
  transform: translateY(-7px) rotate(-45deg);
}

.gs-mobile-menu {
  display: none;
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  bottom: 0;
  background: #fff;
  z-index: 999;
  padding: 24px;
  overflow-y: auto;
}

.gs-mobile-menu.is-open {
  display: block;
}

.gs-mobile-menu a {
  display: block;
  padding: 16px 0;
  font-size: 17px;
  font-weight: 500;
  border-bottom: 1px solid var(--gs-border);
  color: var(--gs-text);
}

.gs-mobile-menu .gs-mobile-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}

.gs-mobile-menu .gs-mobile-actions a {
  text-align: center;
  border-bottom: none;
  padding: 14px 18px;
  border-radius: var(--gs-radius-pill);
}

.gs-mobile-menu .mobile-trial {
  border: 1px solid var(--gs-border);
  color: var(--gs-text-soft);
}

.gs-mobile-menu .mobile-buy {
  background: var(--gs-accent);
  color: #1d1d1d;
  font-weight: 700;
}

@media (max-width: 980px) {
  .gs-nav-menu,
  .gs-nav-actions {
    display: none;
  }
  .gs-hamburger {
    display: flex;
  }
}

/* ============================================
   页脚 Footer
============================================ */
.gs-footer {
  position: relative;
  margin-top: 0;
  background: linear-gradient(180deg, #2a4258 0%, #1d2f40 100%);
  color: #d6dee7;
  overflow: hidden;
}

.gs-footer::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(255, 186, 0, 0.18), transparent 70%);
  pointer-events: none;
}

.gs-footer::after {
  content: "";
  position: absolute;
  bottom: -160px;
  left: -160px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(255, 186, 0, 0.08), transparent 70%);
  pointer-events: none;
}

.gs-footer-inner {
  position: relative;
  z-index: 1;
  padding: 70px 24px 30px;
  max-width: var(--gs-container);
  margin: 0 auto;
}

.gs-footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 50px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.gs-footer-brand img {
  height: 44px;
  margin-bottom: 20px;
  filter: brightness(0) invert(1);
}

.gs-footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #aab7c4;
  max-width: 480px;
}

.gs-footer-products {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.gs-footer-products h4 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--gs-accent);
  text-transform: uppercase;
}

.gs-footer-product-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--gs-radius-md);
  transition: background 0.2s ease, transform 0.2s ease;
}

.gs-footer-product-row:hover {
  background: rgba(255, 255, 255, 0.08);
  transform: translateX(4px);
}

.gs-footer-product-row img {
  height: 36px;
  width: 36px;
  object-fit: contain;
  background: #fff;
  border-radius: 8px;
  padding: 4px;
}

.gs-footer-product-row strong {
  display: block;
  color: #fff;
  font-size: 15px;
}

.gs-footer-product-row span {
  font-size: 12px;
  color: #aab7c4;
}

.gs-footer-mid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding: 40px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.gs-footer-info-card {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.gs-footer-info-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 186, 0, 0.12);
  color: var(--gs-accent);
  display: flex;
  align-items: center;
  justify-content: center;
}

.gs-footer-info-icon svg {
  width: 22px;
  height: 22px;
}

.gs-footer-info-card h5 {
  font-size: 13px;
  font-weight: 600;
  color: #aab7c4;
  margin-bottom: 4px;
  letter-spacing: 1px;
}

.gs-footer-info-card p,
.gs-footer-info-card a {
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.5;
}

.gs-footer-info-card a:hover {
  color: var(--gs-accent);
}

.gs-footer-disclaimer {
  padding: 24px 0;
  font-size: 13px;
  line-height: 1.8;
  color: #8a98a8;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.gs-footer-disclaimer strong {
  color: var(--gs-accent);
  font-weight: 600;
}

.gs-footer-bottom {
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: #8a98a8;
}

@media (max-width: 880px) {
  .gs-footer-inner {
    padding: 56px 22px 24px;
  }
  .gs-footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-bottom: 36px;
  }
  .gs-footer-brand img {
    height: 38px;
    margin-bottom: 16px;
  }
  .gs-footer-brand p {
    font-size: 13.5px;
    line-height: 1.75;
  }
  .gs-footer-mid {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 32px 0;
  }
  .gs-footer-info-card {
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--gs-radius-md);
  }
  .gs-footer-info-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
  }
  .gs-footer-info-icon svg {
    width: 20px;
    height: 20px;
  }
  .gs-footer-info-card p,
  .gs-footer-info-card a {
    font-size: 14.5px;
  }
  .gs-footer-disclaimer {
    padding: 20px 0;
    font-size: 12px;
    line-height: 1.75;
  }
  .gs-footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: 8px;
    font-size: 12px;
    padding-top: 18px;
  }
}
@media (max-width: 560px) {
  .gs-footer-inner {
    padding: 44px 18px 22px;
  }
  .gs-footer-product-row {
    padding: 12px 14px;
    gap: 12px;
  }
  .gs-footer-product-row img {
    height: 32px;
    width: 32px;
  }
  .gs-footer-product-row strong {
    font-size: 14px;
  }
  .gs-footer-product-row span {
    font-size: 11.5px;
  }
}