/* ============================================================
   MoodFlow · 心境 — 内页兼容层
   把旧页面的结构类名映射到昼夜节律设计系统（site.css）。
   内容结构保持不变，只换配色、材质与字体。
   ============================================================ */

/* ---------- 导航（内页沿用裸 <nav>） ---------- */
nav {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--app-bg) 78%, transparent);
  backdrop-filter: blur(22px) saturate(1.4);
  -webkit-backdrop-filter: blur(22px) saturate(1.4);
  border-bottom: 1px solid var(--app-line);
  transition: background-color var(--dur-phase) var(--ease), border-color var(--dur-phase) var(--ease);
}

nav .nav-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 68px;
}

nav .nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--app-text);
  text-decoration: none;
  flex: none;
}

nav .nav-logo img {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  object-fit: cover;
  box-shadow: 0 4px 14px -4px rgba(20, 23, 30, .38);
}

nav .nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

nav .nav-links a {
  padding: 8px 13px;
  border-radius: 10px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--app-text2);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-tap) var(--ease), background-color var(--dur-tap) var(--ease);
}

nav .nav-links a:hover {
  color: var(--app-text);
  background: color-mix(in srgb, var(--app-text) 6%, transparent);
}

nav .lang-btn {
  margin-left: 8px;
  height: 34px;
  padding: 0 14px;
  border-radius: 999px;
  border: 1px solid var(--app-line);
  background: color-mix(in srgb, var(--app-surface) 88%, transparent);
  color: var(--app-text2);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--dur-tap) var(--ease);
}

nav .lang-btn:hover {
  color: var(--app-elev);
  background: var(--app-accent);
  border-color: var(--app-accent);
}

/* ---------- 区块骨架 ---------- */
section {
  padding: 88px 24px;
}

section .section-inner {
  max-width: 900px;
  margin: 0 auto;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--app-accent);
  margin-bottom: 18px;
}

.section-tag::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: .55;
}

.section-title {
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--app-text2);
  margin-bottom: 36px;
  max-width: 62ch;
}

/* ---------- 卡片 ---------- */
section .card {
  padding: 32px 30px;
  margin-bottom: 22px;
}

section .card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 18px;
}

/* ---------- 三维评估行 ---------- */
.dim-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--app-line);
}

.dim-row:last-of-type { border-bottom: none; padding-bottom: 0; }

.dim-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--app-accent) 13%, transparent);
  color: var(--app-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.dim-body h4 { font-size: 15px; font-weight: 700; margin-bottom: 5px; }
.dim-body p { font-size: 13.5px; line-height: 1.72; color: var(--app-text2); }

/* ---------- 呼吸模式条目 ---------- */
.breath-item {
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--app-line);
  background: color-mix(in srgb, var(--app-elev) 45%, transparent);
  margin-bottom: 10px;
}

.breath-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.breath-header h4 { font-size: 14.5px; font-weight: 700; }

.breath-dur {
  font-size: 11px;
  font-weight: 700;
  color: var(--app-accent);
  background: color-mix(in srgb, var(--app-accent) 13%, transparent);
  padding: 3px 11px;
  border-radius: 20px;
  white-space: nowrap;
}

.phase-pills { display: flex; gap: 5px; margin-bottom: 7px; flex-wrap: wrap; }

.phase-pill {
  font-size: 10.5px;
  color: var(--app-text3);
  background: color-mix(in srgb, var(--app-text) 6%, transparent);
  padding: 3px 9px;
  border-radius: 6px;
}

.breath-desc { font-size: 12.5px; line-height: 1.68; color: var(--app-text2); }

/* ---------- 干预类型 ---------- */
.intervention-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 15px 0;
  border-bottom: 1px solid var(--app-line);
}

.intervention-row:last-of-type { border-bottom: none; padding-bottom: 0; }

.intervention-icon {
  width: 30px;
  font-size: 17px;
  text-align: center;
  flex-shrink: 0;
  color: var(--app-accent);
}

.intervention-body h4 { font-size: 14.5px; font-weight: 700; margin-bottom: 4px; }
.intervention-body p { font-size: 12.5px; line-height: 1.68; color: var(--app-text2); }

/* ---------- 氛围音 ---------- */
.ambient-cat {
  padding: 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--app-line);
  background: color-mix(in srgb, var(--app-elev) 45%, transparent);
  margin-bottom: 12px;
}

.ambient-cat h4 { font-size: 14.5px; font-weight: 700; margin-bottom: 6px; }
.ambient-cat p { font-size: 12.5px; line-height: 1.68; color: var(--app-text2); margin-bottom: 10px; }
.ambient-chips { display: flex; gap: 6px; flex-wrap: wrap; }

.ambient-chip {
  font-size: 11px;
  color: var(--app-text2);
  background: color-mix(in srgb, var(--app-text) 6%, transparent);
  padding: 4px 11px;
  border-radius: 20px;
}

/* ---------- 强调块 ---------- */
.highlight-box,
.step-box {
  padding: 22px 24px;
  border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--app-accent) 30%, var(--app-line));
  background: color-mix(in srgb, var(--app-accent) 8%, transparent);
  margin: 22px 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--app-text2);
}

.highlight-box strong,
.step-box strong { color: var(--app-text); }

.step-box { display: flex; gap: 14px; align-items: flex-start; }

/* ---------- 长文正文 ---------- */
main {
  max-width: 780px;
  margin: 0 auto;
  padding: 72px 28px 40px;
}

main h1 {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.14;
  margin-bottom: 14px;
}

main h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.015em;
  margin: 40px 0 12px;
}

main h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 10px;
}

main p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--app-text2);
  margin-bottom: 14px;
}

main ul { margin: 0 0 18px; padding-left: 22px; }
main li { font-size: 15px; line-height: 1.76; color: var(--app-text2); margin-bottom: 8px; }
main strong { color: var(--app-text); font-weight: 700; }
main a { color: var(--app-accent); text-underline-offset: 3px; }

.last-updated {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--app-text3);
  margin-bottom: 30px;
}

/* ---------- 博客 ---------- */
.blog-header { max-width: 780px; margin: 0 auto 40px; }

.blog-header h1 {
  font-size: clamp(30px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.14;
  margin-bottom: 10px;
}

.blog-header p { font-size: 16.5px; line-height: 1.75; color: var(--app-text2); }

.blog-list { max-width: 900px; margin: 0 auto; display: flex; flex-direction: column; gap: 18px; }

.blog-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 30px;
  border-radius: var(--radius);
  border: 1px solid var(--app-line);
  background: color-mix(in srgb, var(--app-surface) 92%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
  text-decoration: none;
  color: inherit;
  transition: transform var(--dur-view) var(--ease), box-shadow var(--dur-view) var(--ease),
              border-color var(--dur-phase) var(--ease);
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lift);
  border-color: color-mix(in srgb, var(--app-accent) 34%, var(--app-line));
}

.blog-card h3 { font-size: 18.5px; font-weight: 700; letter-spacing: -.01em; }
.blog-card .desc { font-size: 14.5px; line-height: 1.72; color: var(--app-text2); }

.blog-card .category,
.post-category {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--app-accent);
}

.blog-card .tags { display: flex; gap: 7px; flex-wrap: wrap; margin-top: 4px; }

.blog-card .tags span {
  font-size: 11px;
  color: var(--app-text3);
  background: color-mix(in srgb, var(--app-text) 6%, transparent);
  padding: 3px 10px;
  border-radius: 20px;
}

.post-date {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--app-text3);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  max-width: 780px;
  margin: 34px auto 0;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--app-text2);
  text-decoration: none;
  border: 1px solid var(--app-line);
  transition: color var(--dur-tap) var(--ease), border-color var(--dur-tap) var(--ease);
}

.back-link:hover { color: var(--app-accent); border-color: color-mix(in srgb, var(--app-accent) 40%, var(--app-line)); }

/* ---------- 文章正文 ---------- */
article {
  max-width: 780px;
  margin: 0 auto;
  padding: 52px 28px 30px;
}

article h1 {
  font-size: clamp(28px, 3.6vw, 40px);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.16;
  margin-bottom: 12px;
}

article h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.015em;
  margin: 40px 0 12px;
}

article h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 28px 0 10px;
}

article p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--app-text2);
  margin-bottom: 14px;
}

article ul { margin: 0 0 18px; padding-left: 22px; }
article li { font-size: 15px; line-height: 1.76; color: var(--app-text2); margin-bottom: 8px; }
article strong { color: var(--app-text); font-weight: 700; }
article a { color: var(--app-accent); text-underline-offset: 3px; }

article .post-category { display: block; margin-bottom: 12px; }
article .post-date { display: block; margin-bottom: 22px; }

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}

/* ---------- 结尾 CTA ---------- */
.cta-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 24px 56px;
  text-align: center;
}

.cta-box {
  position: relative;
  overflow: hidden;
  padding: 40px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--app-line);
  background: color-mix(in srgb, var(--app-surface) 92%, transparent);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(1.25);
  -webkit-backdrop-filter: blur(18px) saturate(1.25);
}

.cta-box::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(70% 100% at 50% 0%, var(--orb-hi), transparent 72%);
  pointer-events: none;
}

.cta-title {
  position: relative;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--app-text);
  margin-bottom: 10px;
}

.cta-desc {
  position: relative;
  font-size: 15px;
  line-height: 1.7;
  color: var(--app-text2);
  margin-bottom: 22px;
}

/* ---------- 页脚 ---------- */
footer {
  margin-top: 40px;
  padding: 42px 24px;
  border-top: 1px solid var(--app-line);
  text-align: center;
  font-size: 13.5px;
  color: var(--app-text3);
}

footer p { margin-bottom: 6px; }
footer a { color: var(--app-accent); text-decoration: none; transition: opacity var(--dur-tap) var(--ease); }
footer a:hover { opacity: .72; text-decoration: underline; }

/* ---------- 响应式 ---------- */
@media (max-width: 860px) {
  nav .nav-inner { height: 62px; padding: 0 20px; }
  nav .nav-links a { display: none; }
  section { padding: 62px 20px; }
  main { padding: 52px 20px 30px; }
}

@media (max-width: 640px) {
  .section-title { font-size: 24px; }
  section .card { padding: 24px 20px; }
  .breath-header { flex-direction: column; align-items: flex-start; gap: 6px; }
}