/* ==========================================================
   使用规范页 · page-disclaimer
   ========================================================== */

.page-disclaimer {
  position: relative;
  overflow-x: hidden;
  padding-bottom: 4px;
  background-image:
    linear-gradient(to right, rgba(30, 53, 84, 0.26) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(30, 53, 84, 0.26) 1px, transparent 1px);
  background-size: 72px 72px;
}

/* ---------- 面包屑与首屏 ---------- */

.page-disclaimer .breadcrumbs {
  padding-top: 22px;
}

.page-disclaimer .usage-hero {
  padding: 26px 0 8px;
}

.page-disclaimer .usage-hero h1 {
  margin: 10px 0 0;
  max-width: 24ch;
  font-size: clamp(28px, 5.2vw, 44px);
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-disclaimer .usage-lede {
  margin: 16px 0 0;
  max-width: 64ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .usage-hero-media {
  position: relative;
  margin-top: 28px;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-disclaimer .usage-hero-media img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.page-disclaimer .usage-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 23, 41, 0) 45%, rgba(11, 23, 41, 0.6));
  pointer-events: none;
}

/* ---------- 章节标题组 ---------- */

.page-disclaimer .dis-head {
  display: grid;
  gap: 10px;
  max-width: 78ch;
  margin-bottom: 24px;
}

.page-disclaimer .dis-head h2,
.page-disclaimer .fact-band h2 {
  margin: 0;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-disclaimer .dis-sub {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .more-title {
  margin: 0 0 16px;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--white);
}

/* ---------- 筛选按钮组 ---------- */

.page-disclaimer .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
}

.page-disclaimer .filter-btn {
  appearance: none;
  padding: 9px 16px;
  border: 1px solid var(--grid);
  border-radius: 999px;
  background: rgba(18, 35, 60, 0.75);
  color: var(--muted);
  font: inherit;
  font-size: 13px;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease;
}

.page-disclaimer .filter-btn:hover {
  border-color: var(--gold);
  color: var(--white);
}

.page-disclaimer .filter-btn[aria-pressed="true"] {
  border-color: var(--gold);
  background: rgba(242, 180, 65, 0.14);
  color: var(--gold);
  font-weight: 600;
}

.page-disclaimer .filter-btn:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-disclaimer .filter-status {
  margin: 0 0 0 auto;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 正反两栏 ---------- */

.page-disclaimer .usage-columns {
  display: grid;
  gap: 18px;
}

.page-disclaimer .usage-col {
  position: relative;
  padding: 24px 20px 20px;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 35, 60, 0.86), rgba(11, 23, 41, 0.6));
  overflow: hidden;
}

.page-disclaimer .usage-col::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.page-disclaimer .usage-col-ok::before {
  background: linear-gradient(90deg, var(--green), rgba(39, 192, 138, 0));
}

.page-disclaimer .usage-col-avoid::before {
  background: linear-gradient(90deg, var(--red), rgba(232, 50, 60, 0));
}

.page-disclaimer .usage-col h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-disclaimer .usage-col-ok h3::before,
.page-disclaimer .usage-col-avoid h3::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.page-disclaimer .usage-col-ok h3::before {
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(39, 192, 138, 0.16);
}

.page-disclaimer .usage-col-avoid h3::before {
  background: var(--red);
  box-shadow: 0 0 0 4px rgba(232, 50, 60, 0.16);
}

.page-disclaimer .usage-col ul {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .usage-item {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 11px;
  align-items: start;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: rgba(8, 19, 36, 0.55);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--white);
  transition: background-color 0.18s ease;
}

.page-disclaimer .usage-item:hover {
  background: rgba(18, 35, 60, 0.92);
}

.page-disclaimer .usage-col-ok .usage-item {
  border-left: 2px solid rgba(39, 192, 138, 0.55);
}

.page-disclaimer .usage-col-avoid .usage-item {
  border-left: 2px solid rgba(232, 50, 60, 0.5);
}

.page-disclaimer .usage-icon {
  width: 20px;
  height: 20px;
  margin-top: 2px;
}

.page-disclaimer .usage-col-ok .usage-icon {
  color: var(--green);
}

.page-disclaimer .usage-col-avoid .usage-icon {
  color: var(--red);
}

.page-disclaimer .usage-item[hidden],
.page-disclaimer .usage-col[hidden] {
  display: none;
}

/* ---------- 引用规范 ---------- */

.page-disclaimer .cite-grid {
  display: grid;
  gap: 20px;
}

.page-disclaimer .cite-notes h3 {
  margin: 0 0 14px;
  font-size: 17px;
  color: var(--white);
}

.page-disclaimer .cite-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .cite-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-disclaimer .cite-tag {
  padding: 2px 7px;
  border: 1px solid rgba(242, 180, 65, 0.4);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--gold);
  white-space: nowrap;
}

.page-disclaimer .cite-tip {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--grid);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .cite-tip a,
.page-disclaimer .panel-body a,
.page-disclaimer .contact-note a {
  color: var(--gold);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-disclaimer .cite-sample {
  margin: 0;
  padding: 20px;
  border: 1px solid var(--grid);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-sm);
  background: #081324;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 2.05;
  overflow-x: auto;
}

.page-disclaimer .cite-sample p {
  margin: 0;
  white-space: nowrap;
}

.page-disclaimer .cite-key {
  color: var(--muted);
}

.page-disclaimer .cite-val {
  color: var(--white);
}

/* ---------- 来源与更新时间横带 ---------- */

.page-disclaimer .fact-band {
  position: relative;
  margin-bottom: 20px;
  padding: 26px 20px 24px;
  border: 1px solid var(--grid);
  border-radius: var(--radius);
  background:
    radial-gradient(130% 150% at 100% 0%, rgba(242, 180, 65, 0.14), transparent 58%),
    linear-gradient(180deg, rgba(18, 35, 60, 0.95), rgba(11, 23, 41, 0.82));
  overflow: hidden;
}

.page-disclaimer .fact-band > * {
  position: relative;
  z-index: 1;
}

.page-disclaimer .fact-band h2 {
  margin-top: 8px;
}

.page-disclaimer .fact-band .dis-sub {
  margin-top: 12px;
}

.page-disclaimer .fact-row {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-disclaimer .fact {
  padding-top: 14px;
  border-top: 1px solid rgba(242, 180, 65, 0.32);
}

.page-disclaimer .fact-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(26px, 4vw, 34px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--gold);
}

.page-disclaimer .fact-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 折叠面板 ---------- */

.page-disclaimer .panel {
  border: 1px solid var(--grid);
  border-radius: var(--radius-sm);
  background: rgba(18, 35, 60, 0.6);
  overflow: hidden;
}

.page-disclaimer .panel-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border: 0;
  background: none;
  color: var(--white);
  font: inherit;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
}

.page-disclaimer .panel-toggle::after {
  content: "＋";
  flex: none;
  font-family: var(--mono);
  font-size: 17px;
  color: var(--gold);
}

.page-disclaimer .panel-toggle[aria-expanded="true"]::after {
  content: "－";
}

.page-disclaimer .panel-toggle:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -3px;
}

.page-disclaimer .panel-body {
  display: grid;
  gap: 12px;
  padding: 16px 18px 20px;
  border-top: 1px solid var(--grid);
}

.page-disclaimer .panel-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-disclaimer .panel-body[hidden] {
  display: none;
}

/* ---------- 反馈步骤 ---------- */

.page-disclaimer .feedback-steps {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-disclaimer .feedback-step {
  display: grid;
  gap: 8px;
  align-content: start;
  padding: 20px 18px 18px;
  border: 1px solid var(--grid);
  border-radius: var(--radius-sm);
  background: rgba(18, 35, 60, 0.68);
}

.page-disclaimer .step-num {
  display: block;
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-disclaimer .feedback-step:nth-child(1) .step-num {
  color: var(--blue);
}

.page-disclaimer .feedback-step:nth-child(2) .step-num {
  color: var(--orange);
}

.page-disclaimer .feedback-step:nth-child(3) .step-num {
  color: var(--green);
}

.page-disclaimer .feedback-step:nth-child(4) .step-num {
  color: var(--gold);
}

.page-disclaimer .feedback-step h3 {
  margin: 0;
  font-size: 15.5px;
  letter-spacing: 0.01em;
  color: var(--white);
}

.page-disclaimer .feedback-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 联系方式 ---------- */

.page-disclaimer .contact-strip {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  padding: 22px 20px;
  border: 1px dashed rgba(242, 180, 65, 0.42);
  border-radius: var(--radius);
  background: rgba(242, 180, 65, 0.05);
}

.page-disclaimer .contact-item {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.page-disclaimer .contact-key {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-disclaimer .contact-val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-disclaimer .contact-item:nth-child(2) .contact-val {
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

.page-disclaimer .contact-note {
  margin: 16px 0 0;
  max-width: 70ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 底部导航 ---------- */

.page-disclaimer .usage-more {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-disclaimer .fact-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 700px) {
  .page-disclaimer .feedback-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-disclaimer .usage-hero-media img {
    height: 280px;
  }

  .page-disclaimer .contact-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-disclaimer .usage-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-disclaimer .usage-col {
    padding: 26px 24px 22px;
  }
}

@media (min-width: 900px) {
  .page-disclaimer .cite-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }

  .page-disclaimer .fact-band {
    padding: 32px 30px 28px;
  }

  .page-disclaimer .dis-head {
    margin-bottom: 30px;
  }
}

@media (min-width: 1080px) {
  .page-disclaimer .feedback-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-disclaimer .filter-btn,
  .page-disclaimer .usage-item {
    transition: none;
  }
}