/* TA TA · AGI Agent 基础设施 — 增量样式（OC-TASK-FULL-008）
   沿用站点 frosted-silver 设计语言：深黑底、磨砂玻璃卡片、银铬点缀。
   本文件只新增，不修改 main.css。 */

.ag-hero {
  padding: 150px 0 60px; position: relative; overflow: hidden;
}
.ag-hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(700px 380px at 20% 0%, rgba(255,255,255,0.06), transparent 62%),
    radial-gradient(560px 340px at 85% 90%, rgba(199,204,214,0.07), transparent 65%);
}
.ag-kicker { margin-bottom: 16px; }
.ag-title {
  font-size: clamp(30px, 4.4vw, 52px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.25;
}
.ag-title .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ag-sub { color: var(--ink-2); font-size: 17px; max-width: 720px; margin-top: 14px; }

.view-toggle {
  display: inline-flex; gap: 6px; margin: 30px 0 0; padding: 5px;
  background: var(--glass); border: 1px solid var(--line); border-radius: 99px;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.view-toggle button {
  border: 0; background: none; color: var(--ink-2); font-family: var(--font-cn);
  font-size: 14px; font-weight: 600; padding: 9px 22px; border-radius: 99px; cursor: pointer;
  transition: all 0.25s; white-space: nowrap;
}
.view-toggle button.active { background: var(--chrome); color: #0B0B0D; box-shadow: 0 4px 16px rgba(0,0,0,0.3); }

.ag-section { padding: 34px 0; }
.ag-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.ag-card {
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.08);
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column; gap: 10px;
}
.ag-card:hover { transform: translateY(-6px); border-color: rgba(217,221,228,0.4); box-shadow: 0 20px 50px rgba(0,0,0,0.4); }
.ag-card h3 { font-size: 19px; font-weight: 700; }
.ag-card p { color: var(--ink-2); font-size: 14px; line-height: 1.7; flex: 1; }
.ag-meta { display: flex; flex-wrap: wrap; gap: 8px; }
.ag-tag {
  font-size: 12px; color: var(--ink-2); border: 1px solid var(--line); border-radius: 99px;
  padding: 4px 12px; background: rgba(255,255,255,0.03); white-space: nowrap;
}
.ag-tag.hot { color: #0B0B0D; background: var(--chrome); border-color: transparent; font-weight: 700; }
.ag-price { font-family: var(--font-disp); font-size: 26px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ag-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.ag-trust { font-size: 12.5px; color: var(--ink-2); }
.ag-trust b { color: var(--ink); font-family: var(--font-mono); }
.ag-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-cn); font-size: 14px; font-weight: 700; cursor: pointer;
  border-radius: 12px; padding: 11px 22px; border: 1px solid var(--line);
  background: rgba(255,255,255,0.05); color: var(--ink); transition: all 0.25s; white-space: nowrap;
}
.ag-btn:hover { border-color: rgba(217,221,228,0.5); background: rgba(255,255,255,0.09); }
.ag-btn.primary { background: var(--chrome); color: #0B0B0D; border: 0; box-shadow: inset 0 1px 0 rgba(255,255,255,0.65), 0 6px 22px rgba(0,0,0,0.35); }
.ag-btn:disabled { opacity: 0.45; cursor: default; }
.ag-btn.small { padding: 8px 16px; font-size: 13px; border-radius: 10px; }

.ag-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.ag-step {
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 20px; position: relative; -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.ag-step::before {
  counter-increment: step; content: "0" counter(step);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; color: var(--ink-3);
  display: block; margin-bottom: 12px;
}
.ag-step h4 { font-size: 16px; margin-bottom: 8px; }
.ag-step p { color: var(--ink-2); font-size: 13.5px; line-height: 1.7; }

.safety-banner {
  margin: 56px 0 0; border: 1px dashed rgba(217,221,228,0.45); border-radius: 18px;
  padding: 26px 30px; background: rgba(217,221,228,0.04);
  display: flex; gap: 16px; align-items: flex-start;
}
.safety-banner .s-icon {
  flex: none; width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: var(--chrome); color: #0B0B0D; font-weight: 800; font-size: 18px;
}
.safety-banner h4 { font-size: 15px; margin-bottom: 8px; letter-spacing: 0.06em; }
.safety-banner p { color: var(--ink-2); font-size: 13.5px; line-height: 1.8; }

.doc-view { display: none; }
.doc-view.on { display: block; }
.human-view.off { display: none; }
.doc-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,0.015); }
table.doc-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 720px; }
.doc-table th { text-align: left; padding: 13px 16px; font-size: 11px; letter-spacing: 0.18em; color: var(--ink-3); font-family: var(--font-mono); text-transform: uppercase; border-bottom: 1px solid var(--line); white-space: nowrap; }
.doc-table td { padding: 12px 16px; border-bottom: 1px solid rgba(255,255,255,0.045); vertical-align: top; }
.doc-table tr:last-child td { border-bottom: 0; }
.doc-table code, .code-inline {
  font-family: var(--font-mono); font-size: 12.5px; background: rgba(255,255,255,0.06);
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px; white-space: nowrap;
}
.method { font-family: var(--font-mono); font-size: 11px; font-weight: 800; border-radius: 6px; padding: 3px 9px; letter-spacing: 0.08em; }
.method.get { background: rgba(199,204,214,0.16); color: #EDEFF3; border: 1px solid rgba(199,204,214,0.4); }
.method.post { background: rgba(242,244,247,0.14); color: #fff; border: 1px solid rgba(242,244,247,0.45); }

.code-block {
  background: #0C0C0F; border: 1px solid var(--line); border-radius: 14px;
  padding: 20px 22px; font-family: var(--font-mono); font-size: 13px; line-height: 1.9;
  overflow-x: auto; color: #C9CDD6; margin: 14px 0;
}
.code-block .cm { color: #6B7078; }
.code-block .kw { color: #F2F4F7; font-weight: 700; }

.ag-form {
  background: var(--glass); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  display: grid; gap: 14px; max-width: 640px;
}
.ag-form label { display: grid; gap: 7px; font-size: 13.5px; color: var(--ink-2); }
.ag-form input, .ag-form textarea, .ag-form select {
  background: rgba(255,255,255,0.04); border: 1px solid var(--line); border-radius: 10px;
  color: var(--ink); padding: 11px 14px; font-size: 14.5px; font-family: var(--font-cn);
  outline: none; width: 100%; box-sizing: border-box;
}
.ag-form input:focus, .ag-form textarea:focus { border-color: rgba(217,221,228,0.55); }
.ag-note { font-size: 13px; color: var(--ink-3); }
.ag-err { background: rgba(255,95,87,0.1); border: 1px solid rgba(255,95,87,0.4); color: #ff9d97; border-radius: 10px; padding: 10px 14px; font-size: 13.5px; }
.ag-okmsg { background: rgba(52,211,153,0.1); border: 1px solid rgba(52,211,153,0.4); color: #6ee7b7; border-radius: 10px; padding: 10px 14px; font-size: 13.5px; }

.login-gate {
  max-width: 460px; margin: 40px auto; text-align: center;
  background: var(--glass); border: 1px solid var(--line); border-radius: 24px;
  padding: 44px 36px; -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.09);
}
.login-gate h3 { font-size: 20px; margin-bottom: 10px; }
.login-gate p { color: var(--ink-2); font-size: 14px; margin-bottom: 22px; }
.login-gate .ag-form { background: none; border: 0; padding: 0; -webkit-backdrop-filter: none; backdrop-filter: none; }

.kv-list { display: grid; gap: 10px; }
.kv-row {
  display: flex; justify-content: space-between; gap: 14px; align-items: baseline;
  border-bottom: 1px solid var(--line); padding: 10px 2px; font-size: 14px;
}
.kv-row .k { color: var(--ink-3); font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; white-space: nowrap; }
.kv-row .v { color: var(--ink); text-align: right; word-break: break-all; }

/* 首页 Banner 卡片（增量） */
.ag-banner {
  border: 1px solid var(--line); border-radius: 28px; padding: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(640px 340px at 18% 8%, rgba(255,255,255,0.07), transparent 62%),
    radial-gradient(520px 300px at 85% 95%, rgba(199,204,214,0.08), transparent 65%),
    var(--glass);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.09), 0 24px 70px rgba(0,0,0,0.35);
  position: relative; overflow: hidden; text-align: center;
}
.ag-banner h2 { font-size: clamp(26px, 3.6vw, 44px); font-weight: 800; letter-spacing: -0.02em; line-height: 1.35; }
.ag-banner h2 .grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.ag-banner p { color: var(--ink-2); margin: 16px auto 0; max-width: 640px; font-size: 16.5px; }
.ag-banner .ag-banner-links { display: flex; gap: 14px; justify-content: center; margin-top: 30px; flex-wrap: wrap; }

/* 导航下拉（增量） */
.nav-drop { position: relative; }
.nav-drop > button {
  background: none; border: 0; color: var(--ink-2); font-size: 14.5px; font-family: var(--font-cn);
  cursor: pointer; padding: 6px 2px; display: inline-flex; align-items: center; gap: 6px;
}
.nav-drop > button:hover { color: var(--ink); }
.nav-drop > button .caret { font-size: 10px; color: var(--ink-3); }
.nav-drop-menu {
  position: absolute; top: calc(100% + 12px); left: 50%; transform: translate(-50%, 8px);
  min-width: 230px; background: rgba(16,16,20,0.92); border: 1px solid var(--line); border-radius: 16px;
  padding: 8px; opacity: 0; pointer-events: none; transition: all 0.25s;
  -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5); z-index: 120;
}
.nav-drop.open .nav-drop-menu, .nav-drop:hover .nav-drop-menu { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
.nav-drop-menu a { display: block; padding: 11px 16px; border-radius: 10px; color: var(--ink-2); font-size: 14px; }
.nav-drop-menu a:hover { background: rgba(255,255,255,0.06); color: var(--ink); }
.nav-drop-menu a small { display: block; color: var(--ink-3); font-size: 11.5px; margin-top: 2px; }

@media (max-width: 1020px) {
  .ag-grid { grid-template-columns: repeat(2, 1fr); }
  .ag-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .ag-grid, .ag-steps { grid-template-columns: 1fr; }
  .ag-hero { padding-top: 120px; }
  .safety-banner { flex-direction: column; }
}