/* ============================================================================
   小羽毕业创作工作台 · 产品介绍页（landing）
   依赖：tokens.css（设计令牌）+ components.css（共享组件）
   本文件只写介绍页专有版式（gd- 命名空间）。
   ============================================================================ */

body.gd-landing {
  background: var(--xy-paper);
  color: var(--xy-ink);
}

.gd-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--xy-blue-600);
  color: var(--xy-ink-inverse);
  padding: var(--xy-s2) var(--xy-s4);
  z-index: 200;
}
.gd-skip:focus { left: 0; }

/* ---------------------------------------------------------------- 头部 */
.gd-header {
  position: sticky;
  top: 0;
  z-index: var(--xy-z-header);
  background: rgba(250, 247, 241, 0.9);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--xy-line);
}
.gd-header-inner {
  max-width: var(--xy-w-page);
  margin: 0 auto;
  padding: var(--xy-s2) var(--xy-s5);
  min-height: var(--xy-header-h);
  display: flex;
  align-items: center;
  gap: var(--xy-s4);
  flex-wrap: wrap;
}
.gd-brand { display: flex; align-items: center; gap: var(--xy-s2); text-decoration: none; color: var(--xy-ink); }
.gd-brand-mark {
  width: 36px; height: 36px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--xy-blue-100);
  box-shadow: inset 0 0 0 1px var(--xy-blue-200);
}
.gd-brand-mark img { width: 100%; height: 100%; object-fit: cover; display: block; }
.gd-brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.gd-brand-text strong { font-size: var(--xy-fs-base); color: var(--xy-blue-700); letter-spacing: 0.02em; }
.gd-brand-text small { font-size: 11.5px; color: var(--xy-ink-3); }

.gd-nav { display: flex; align-items: center; gap: var(--xy-s1); margin-left: auto; flex-wrap: wrap; }
.gd-nav a {
  padding: 6px 11px;
  border-radius: var(--xy-r-pill);
  text-decoration: none;
  color: var(--xy-ink-2);
  font-size: var(--xy-fs-sm);
}
.gd-nav a:hover { background: var(--xy-blue-050); color: var(--xy-blue-700); }

.gd-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--xy-s2);
  min-height: 40px;
  padding: 8px 20px;
  border-radius: var(--xy-r-pill);
  border: 1px solid var(--xy-blue-600);
  background: var(--xy-blue-600);
  color: var(--xy-ink-inverse);
  font-size: var(--xy-fs-sm);
  font-weight: 600;
  text-decoration: none;
  transition: background var(--xy-t-fast) var(--xy-ease), border-color var(--xy-t-fast) var(--xy-ease);
}
.gd-cta:hover { background: var(--xy-blue-700); border-color: var(--xy-blue-700); color: var(--xy-ink-inverse); }
.gd-cta-ghost { background: transparent; border-color: var(--xy-line-strong); color: var(--xy-blue-700); }
.gd-cta-ghost:hover { background: var(--xy-blue-050); border-color: var(--xy-blue-200); color: var(--xy-blue-700); }
.gd-cta-nav { min-height: 34px; padding: 5px 15px; font-size: var(--xy-fs-xs); margin-left: var(--xy-s2); }

/* ---------------------------------------------------------------- Hero */
.gd-hero {
  border-bottom: 1px solid var(--xy-line);
  background:
    radial-gradient(900px 380px at 88% 6%, var(--xy-blue-100), transparent 68%),
    radial-gradient(700px 320px at 6% 96%, var(--xy-paper-warm), transparent 65%);
}
.gd-hero-inner {
  max-width: var(--xy-w-page);
  margin: 0 auto;
  padding: var(--xy-s9) var(--xy-s5) var(--xy-s8);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: var(--xy-s7);
  align-items: center;
}

.gd-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--xy-s2);
  color: var(--xy-blue-600);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 var(--xy-s3);
}
.gd-eyebrow::before {
  content: "";
  width: 22px;
  height: 1.5px;
  background: var(--xy-blue-400);
  border-radius: 2px;
}

.gd-hero h1 {
  font-size: var(--xy-fs-3xl);
  line-height: 1.24;
  letter-spacing: -0.005em;
  margin: 0 0 var(--xy-s4);
  color: var(--xy-blue-700);
}
.gd-hero h1 em {
  font-style: normal;
  color: var(--xy-blue-600);
  box-shadow: inset 0 -0.42em 0 var(--xy-blue-100);
}
.gd-hero-sub {
  margin: 0 0 var(--xy-s5);
  color: var(--xy-ink-2);
  font-size: var(--xy-fs-md);
  line-height: var(--xy-lh-relaxed);
  max-width: 46ch;
}
.gd-hero-actions { display: flex; gap: var(--xy-s3); flex-wrap: wrap; }

.gd-hero-points {
  list-style: none;
  padding: 0;
  margin: var(--xy-s5) 0 0;
  display: flex;
  gap: var(--xy-s2) var(--xy-s5);
  flex-wrap: wrap;
  font-size: var(--xy-fs-sm);
  color: var(--xy-ink-2);
}
.gd-hero-points li { display: inline-flex; align-items: center; gap: var(--xy-s2); margin: 0; }
.gd-hero-points li::before {
  content: "";
  width: 15px; height: 15px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--xy-ok-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.4l3 3 6-6.4' fill='none' stroke='%232F6B4F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 11px no-repeat;
  box-shadow: inset 0 0 0 1px var(--xy-ok-line);
}

/* 角色区：小羽本体 + 环绕的能力标签 */
.gd-hero-figure {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 400px;
}
.gd-hero-orbit {
  position: absolute;
  width: min(340px, 82%);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px dashed var(--xy-blue-200);
  background: radial-gradient(circle at 50% 40%, rgba(255, 255, 255, 0.9), rgba(220, 234, 247, 0.35) 62%, transparent 72%);
}
.gd-hero-portrait {
  position: relative;
  width: 100%;
  max-width: 320px;
  height: auto;
  filter: drop-shadow(0 16px 34px rgba(47, 99, 149, 0.2));
}
.gd-hero-tag {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: var(--xy-s2);
  background: var(--xy-surface);
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-pill);
  padding: 6px 13px 6px 8px;
  font-size: var(--xy-fs-xs);
  font-weight: 600;
  color: var(--xy-blue-700);
  box-shadow: var(--xy-shadow-2);
  white-space: nowrap;
}
.gd-hero-tag i {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--xy-blue-050);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.gd-hero-tag svg { width: 13px; height: 13px; }
.gd-tag-1 { top: 6%; left: 0; }
.gd-tag-2 { top: 44%; right: 0; }
.gd-tag-3 { bottom: 7%; left: 8%; }

@media (prefers-reduced-motion: no-preference) {
  .gd-tag-1 { animation: gd-drift 7s ease-in-out infinite; }
  .gd-tag-2 { animation: gd-drift 7s ease-in-out 1.4s infinite; }
  .gd-tag-3 { animation: gd-drift 7s ease-in-out 2.8s infinite; }
}
@keyframes gd-drift {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* ---------------------------------------------------------------- 分节 */
.gd-section { padding: var(--xy-s9) 0; }
.gd-section-alt { background: var(--xy-surface); border-top: 1px solid var(--xy-line); border-bottom: 1px solid var(--xy-line); }
.gd-section-inner { max-width: var(--xy-w-page); margin: 0 auto; padding: 0 var(--xy-s5); }
.gd-section h2 { font-size: var(--xy-fs-2xl); margin: 0 0 var(--xy-s2); }
.gd-section-lead { margin: 0 0 var(--xy-s6); color: var(--xy-ink-2); max-width: 62ch; font-size: var(--xy-fs-md); }

/* 工作流：桌面 5 列带连接线，窄屏纵向时间轴 */
.gd-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--xy-s4);
  position: relative;
}
.gd-flow li { position: relative; margin: 0; }
.gd-flow li::after {
  content: "";
  position: absolute;
  top: 17px;
  left: calc(100% - 6px);
  width: var(--xy-s4);
  height: 1.5px;
  background: var(--xy-blue-200);
}
.gd-flow li:last-child::after { display: none; }
.gd-step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: var(--xy-surface);
  border: 1.5px solid var(--xy-blue-200);
  color: var(--xy-blue-700);
  font-weight: 700;
  font-size: var(--xy-fs-sm);
  margin-bottom: var(--xy-s3);
}
.gd-flow h3 { font-size: var(--xy-fs-base); margin: 0 0 var(--xy-s1); color: var(--xy-ink); }
.gd-flow p { margin: 0; font-size: var(--xy-fs-sm); color: var(--xy-ink-2); line-height: 1.65; }

/* 特性卡 */
.gd-grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--xy-s4); }
.gd-grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--xy-s4); }

.gd-feature {
  background: var(--xy-paper);
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-md);
  padding: var(--xy-s5);
  display: flex;
  flex-direction: column;
  gap: var(--xy-s2);
}
.gd-section-alt .gd-feature { background: var(--xy-surface-cool); border-color: var(--xy-line-cool); }
.gd-feature h3 {
  display: flex;
  align-items: center;
  gap: var(--xy-s2);
  margin: 0;
  font-size: var(--xy-fs-base);
  color: var(--xy-ink);
}
.gd-feature h3 .gd-ico {
  width: 28px; height: 28px;
  border-radius: var(--xy-r-xs);
  background: var(--xy-blue-050);
  color: var(--xy-blue-600);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.gd-feature h3 .gd-ico svg { width: 15px; height: 15px; }
.gd-feature p { margin: 0; font-size: var(--xy-fs-sm); color: var(--xy-ink-2); }
.gd-feature-warn { background: var(--xy-warn-soft); border-color: var(--xy-warn-line); }
.gd-feature-warn h3 { color: var(--xy-warn); }
.gd-feature-warn h3 .gd-ico { background: var(--xy-ink-inverse); color: var(--xy-warn); }

/* 清单 */
.gd-checks { list-style: none; margin: 0; padding: 0; }
.gd-checks li {
  position: relative;
  padding: 5px 0 5px 24px;
  font-size: var(--xy-fs-sm);
  color: var(--xy-ink-2);
  margin: 0;
}
.gd-checks li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.4l3 3 6-6.4' fill='none' stroke='%232E6395' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 13px no-repeat;
}
.gd-checks.gd-cross li::before {
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 4.5l7 7M11.5 4.5l-7 7' fill='none' stroke='%239C3B30' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E") center / 11px no-repeat;
}

.gd-note {
  margin: var(--xy-s3) 0 0;
  padding: var(--xy-s3) var(--xy-s4);
  border-radius: var(--xy-r-sm);
  background: var(--xy-warn-soft);
  border: 1px solid var(--xy-warn-line);
  color: var(--xy-warn);
  font-size: var(--xy-fs-sm);
  line-height: 1.7;
}

/* 使用说明 */
.gd-how { margin: 0; padding: 0; list-style: none; display: grid; gap: var(--xy-s3); counter-reset: how; }
.gd-how li {
  counter-increment: how;
  display: flex;
  gap: var(--xy-s3);
  align-items: flex-start;
  background: var(--xy-paper);
  border: 1px solid var(--xy-line);
  border-radius: var(--xy-r-sm);
  padding: var(--xy-s3) var(--xy-s4);
  color: var(--xy-ink-2);
  font-size: var(--xy-fs-sm);
  margin: 0;
}
.gd-how li::before {
  content: counter(how);
  flex-shrink: 0;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--xy-blue-050);
  border: 1px solid var(--xy-blue-200);
  color: var(--xy-blue-700);
  font-size: var(--xy-fs-xs);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.gd-how strong { color: var(--xy-ink); }
.gd-center { justify-content: center; margin-top: var(--xy-s6); display: flex; }

/* 收尾行动区 */
.gd-final {
  background: linear-gradient(135deg, var(--xy-blue-050), var(--xy-surface) 60%);
  border-top: 1px solid var(--xy-line);
  border-bottom: 1px solid var(--xy-line);
}
.gd-final-inner {
  max-width: var(--xy-w-page);
  margin: 0 auto;
  padding: var(--xy-s8) var(--xy-s5);
  display: grid;
  grid-template-columns: minmax(0, 1fr) 200px;
  gap: var(--xy-s6);
  align-items: center;
}
.gd-final h2 { font-size: var(--xy-fs-xl); margin: 0 0 var(--xy-s2); }
.gd-final p { margin: 0 0 var(--xy-s4); color: var(--xy-ink-2); }
.gd-final figure { justify-self: center; }
.gd-final figure img { width: 100%; max-width: 180px; }

/* ---------------------------------------------------------------- 页脚 */
.gd-footer { border-top: 1px solid var(--xy-line); background: var(--xy-paper-deep); padding: var(--xy-s5) 0 var(--xy-s6); }
.gd-footer-inner { max-width: var(--xy-w-page); margin: 0 auto; padding: 0 var(--xy-s5); display: flex; gap: var(--xy-s4); flex-wrap: wrap; align-items: center; }
.gd-footer p { margin: 0; font-size: 11.5px; color: var(--xy-ink-3); line-height: 1.7; flex: 1 1 420px; }
.gd-footer .gd-foot-brand { display: flex; align-items: center; gap: var(--xy-s2); font-size: var(--xy-fs-xs); color: var(--xy-ink-3); }

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1040px) {
  .gd-flow { grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: var(--xy-s5); }
  .gd-flow li:nth-child(3n)::after { display: none; }
  .gd-grid-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .gd-hero-inner { grid-template-columns: 1fr; padding-top: var(--xy-s6); }
  .gd-hero h1 { font-size: var(--xy-fs-2xl); }
  /* 移动端先给标题与行动按钮，形象放在其后：首屏必须能看到「这是什么 + 去哪」 */
  .gd-hero-figure { min-height: 280px; margin-top: var(--xy-s4); }
  .gd-hero-portrait { max-width: 200px; }
  .gd-hero-orbit { width: min(230px, 66%); }
  .gd-grid-2 { grid-template-columns: 1fr; }
  .gd-final-inner { grid-template-columns: 1fr; }
  .gd-final figure { display: none; }
}

@media (max-width: 720px) {
  .gd-nav { display: none; }
  .gd-cta-nav { margin-left: auto; }
  .gd-header-inner { padding: var(--xy-s2) var(--xy-s3); }
  .gd-hero-inner { padding: var(--xy-s6) var(--xy-s3) var(--xy-s6); }
  .gd-hero-sub { font-size: var(--xy-fs-base); }
  .gd-section { padding: var(--xy-s7) 0; }
  .gd-section-inner { padding: 0 var(--xy-s3); }
  .gd-flow { grid-template-columns: 1fr; }
  .gd-flow li { display: grid; grid-template-columns: 34px 1fr; gap: var(--xy-s3); }
  .gd-flow li::after { display: none; }
  .gd-step-no { margin-bottom: 0; }
  .gd-grid-3 { grid-template-columns: 1fr; }
  .gd-hero-actions { flex-direction: column; align-items: stretch; }
  .gd-hero-points { gap: var(--xy-s2); }
  .gd-hero-tag { font-size: 11px; padding: 5px 10px 5px 6px; }
  .gd-tag-2 { right: -4px; }
  .gd-footer .gd-footer-inner { padding: 0 var(--xy-s3); }
}

@media (max-width: 360px) {
  .gd-hero h1 { font-size: var(--xy-fs-xl); }
  .gd-hero-figure { min-height: 250px; }
  .gd-hero-portrait { max-width: 180px; }
  .gd-hero-tag { display: none; }
  .gd-section h2 { font-size: var(--xy-fs-xl); }
}