/**
 * 章节层：各页面模块的专属样式。
 * 章节渲染器产出固定类名，样式集中在本文件，便于按章节独立调整而不影响全局。
 */

/* =========================================================
   Hero
   ========================================================= */
.section-hero {
  position: relative;
  padding: var(--sp-20) 0 var(--sp-16);
  overflow: hidden;
  background:
    radial-gradient(900px 460px at 78% -8%, rgba(15, 118, 110, 0.14), transparent 62%),
    radial-gradient(700px 420px at 8% 12%, rgba(37, 99, 235, 0.1), transparent 60%),
    linear-gradient(180deg, #f7fbfa 0%, #ffffff 78%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--sp-12);
  align-items: center;
}

.hero-badge {
  display: inline-block;
  margin-bottom: var(--sp-5);
  padding: 6px 14px;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--brand);
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.95);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-full);
}

.hero-title {
  font-size: clamp(2rem, 4.2vw, 3.25rem);
  line-height: 1.18;
  margin-bottom: var(--sp-5);
}

.hero-highlight {
  background: linear-gradient(120deg, var(--brand) 0%, #14b8a6 55%, #2563eb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-desc {
  max-width: 620px;
  font-size: var(--fs-lg);
  line-height: var(--lh-snug);
  color: var(--ink-600);
  margin-bottom: var(--sp-6);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-bottom: var(--sp-10);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4);
}

/* 指标卡：外层玻璃（与驾驶舱面板是兄弟关系，不构成嵌套）。
   小卡片用 1.7rem 圆角偏大，覆盖为常规圆角。 */
.metric-card {
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--radius-md);
  transition: transform var(--dur-base) var(--ease), background var(--dur-base) var(--ease);
}

.metric-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.78);
}

/* 玻璃高光伪元素会盖在内容之上，需让内容上浮（.card 已有同类规则） */
.metric-card > *,
.contact-item > * {
  position: relative;
  z-index: 1;
}

.metric-value {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 2px;
}

.metric-number {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--brand);
  letter-spacing: -0.02em;
}

.metric-unit {
  font-size: var(--fs-sm);
  color: var(--ink-500);
}

.metric-label {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--ink-800);
}

.metric-hint,
.practice-metric-hint {
  margin-top: 4px;
  font-size: var(--fs-xs);
  line-height: 1.5;
  color: var(--ink-500);
}

/* 驾驶舱面板：外层玻璃（材质属性由 .glass 提供，此处只管布局） */
.hero-panel {
  position: relative;
  padding: var(--sp-6);
  overflow: hidden;
}

/* 玻璃顶部弧形高光 */
.hero-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 40%;
  border-radius: 50% 50% 100% 100% / 0 0 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.hero-panel > * { position: relative; z-index: 1; }

.panel-head {
  padding-bottom: var(--sp-4);
  margin-bottom: var(--sp-4);
  border-bottom: 1px dashed var(--ink-200);
}

.panel-head h3 {
  font-size: var(--fs-md);
  margin-bottom: 4px;
}

.panel-head p {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--ink-500);
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}

/* 玻璃内部的内层面板：不叠加 backdrop-filter（滤镜相乘会糊） */
.panel-card {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-4) var(--sp-3);
}

.panel-tag {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-500);
}

.panel-tag.tone-info { color: var(--info); }
.panel-tag.tone-warning { color: var(--warning); }
.panel-tag.tone-success { color: var(--success); }

.panel-value {
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--ink-900);
  letter-spacing: -0.02em;
}

.panel-label {
  font-size: 11px;
  color: var(--ink-500);
}

.panel-progress-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--sp-2);
  font-size: var(--fs-sm);
  color: var(--ink-600);
}

.panel-progress-head strong {
  color: var(--brand);
}

/* =========================================================
   Background
   ========================================================= */
.card-problem {
  overflow: hidden;
}

/* 外层玻璃（材质由 .glass 提供） */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--sp-4);
  margin-top: var(--sp-8);
  padding: var(--sp-6);
}

.stat-item {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
}

.stat-item strong {
  font-size: var(--fs-2xl);
  font-weight: 800;
  color: var(--brand);
}

.stat-item span {
  font-size: var(--fs-sm);
  color: var(--ink-600);
}

/* =========================================================
   Overview
   ========================================================= */
.framework {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: var(--sp-6);
  margin-bottom: var(--sp-12);
}

/* 核心底座：半透明品牌渐变 + 玻璃高光，保持与整体玻璃语言一致 */
.framework-core {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: var(--sp-2);
  padding: var(--sp-8);
  color: #fff;
  background: linear-gradient(150deg, rgba(15, 118, 110, 0.88) 0%, rgba(14, 148, 136, 0.8) 100%);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: var(--radius-xl);
  -webkit-backdrop-filter: blur(14px) saturate(170%);
  backdrop-filter: url(#lg-refraction) blur(14px) saturate(170%);
  box-shadow:
    0 16px 46px rgba(15, 118, 110, 0.28),
    inset 0 2px 0 rgba(255, 255, 255, 0.35),
    inset 0 0 0 1px rgba(255, 255, 255, 0.16);
  overflow: hidden;
}

.framework-core::before {
  content: "";
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 44%;
  border-radius: 50% 50% 100% 100% / 0 0 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.3), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.framework-core > * { position: relative; z-index: 1; }

.framework-core-tag {
  padding: 4px 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  background: rgba(255, 255, 255, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius-full);
}

.framework-core strong {
  font-size: var(--fs-xl);
  color: #fff;
}

.framework-core p {
  margin: 0;
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.86);
}

.framework-rings {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--sp-4);
  padding: var(--sp-8);
}

.framework-ring-label {
  font-size: var(--fs-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.ring-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.ring-item {
  padding: var(--sp-3) var(--sp-5);
  font-weight: 600;
  color: var(--ink-800);
  background: linear-gradient(90deg, rgba(213, 242, 238, 0.8), rgba(213, 242, 238, 0.15));
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-left: 3px solid var(--brand);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.framework-ring-note {
  font-size: var(--fs-sm);
  color: var(--brand);
  font-weight: 600;
}

/* 三大体系卡：外层玻璃 + 顶部色条（色条用渐变伪元素，避免破坏玻璃边框） */
.pillar-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--sp-6);
  padding-top: calc(var(--sp-6) + 2px);
  transition: transform var(--dur-base) var(--ease);
}

.pillar-card::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), rgba(15, 118, 110, 0.25));
}

.pillar-card.tone-accent::after {
  background: linear-gradient(90deg, var(--accent), rgba(245, 158, 11, 0.25));
}
.pillar-card.tone-success::after {
  background: linear-gradient(90deg, var(--success), rgba(22, 163, 74, 0.25));
}

.pillar-card:hover { transform: translateY(-3px); }

.pillar-card > * { position: relative; z-index: 1; }

.pillar-head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.pillar-code {
  display: inline-grid;
  place-items: center;
  width: 32px;
  height: 32px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--brand);
  background: rgba(213, 242, 238, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.85);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
}

.pillar-card.tone-accent .pillar-code {
  color: var(--accent);
  background: rgba(254, 243, 199, 0.85);
}
.pillar-card.tone-success .pillar-code {
  color: var(--success);
  background: rgba(220, 252, 231, 0.85);
}

.pillar-head h3 {
  margin: 0;
  font-size: var(--fs-md);
}

.pillar-summary {
  margin-bottom: var(--sp-4);
  font-size: var(--fs-sm);
  color: var(--ink-600);
}

.pillar-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-top: auto;
}

.pillar-list li {
  display: flex;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--ink-700);
}

.mapping {
  margin-top: var(--sp-12);
}

.mapping-head {
  margin-bottom: var(--sp-5);
  text-align: center;
}

.mapping-head h3 {
  font-size: var(--fs-lg);
  margin-bottom: var(--sp-2);
}

.mapping-head p {
  margin: 0 auto;
  max-width: 640px;
  font-size: var(--fs-sm);
  color: var(--ink-500);
}

/* =========================================================
   Capability
   ========================================================= */
.status-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-5);
  margin: calc(-1 * var(--sp-6)) auto var(--sp-10);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
}

.legend-desc {
  font-size: var(--fs-sm);
  color: var(--ink-500);
}

.capability-group {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--sp-6);
}

.capability-group > * { position: relative; z-index: 1; }

.capability-group-head {
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid rgba(148, 163, 184, 0.2);
}

.capability-group-head h3 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-md);
}

.capability-group-head p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--ink-500);
}

.capability-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

/* 内层面板（无 backdrop-filter） */
.capability-item {
  padding: var(--sp-4);
  transition: background var(--dur-fast) var(--ease);
}

.capability-item:hover {
  background: rgba(213, 242, 238, 0.72);
}

.capability-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  margin-bottom: 4px;
}

.capability-item-head h4 {
  margin: 0;
  font-size: var(--fs-base);
}

.capability-item p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--ink-600);
}

/* =========================================================
   Technology
   ========================================================= */
.tech-block {
  display: flex;
  flex-direction: column;
  gap: var(--sp-8);
}

.tech-nav {
  display: flex;
  align-items: stretch;
  gap: var(--sp-2);
  overflow-x: auto;
  padding-bottom: var(--sp-2);
}

.tech-step {
  flex: 1 1 0;
  min-width: 148px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--sp-4) var(--sp-3);
  text-align: left;
  color: rgba(226, 232, 240, 0.7);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  backdrop-filter: blur(10px) saturate(140%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
  transition: background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease),
    transform var(--dur-base) var(--ease), box-shadow var(--dur-base) var(--ease);
}

.tech-step:hover {
  background: rgba(255, 255, 255, 0.11);
  transform: translateY(-2px);
}

.tech-step.is-active {
  color: #fff;
  background: rgba(15, 118, 110, 0.34);
  border-color: rgba(94, 234, 212, 0.55);
  box-shadow:
    0 10px 28px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.tech-step-no {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: #5eead4;
}

.tech-step-en {
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  opacity: 0.7;
}

.tech-step-cn {
  font-size: var(--fs-sm);
  font-weight: 600;
}

.tech-step-line {
  flex: 0 0 18px;
  align-self: center;
  height: 1px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.25));
}

/* 深色玻璃面板 */
.tech-panel {
  position: relative;
  padding: var(--sp-6);
  background: var(--glass-dark-bg);
  border: 1px solid var(--glass-dark-border);
  border-radius: var(--radius-xl);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(160%);
  backdrop-filter: url(#lg-refraction) blur(var(--glass-blur)) saturate(160%);
  box-shadow:
    var(--glass-shadow-dark),
    inset 0 2px 0 rgba(255, 255, 255, 0.18),
    inset 0 0 0 1px rgba(255, 255, 255, 0.10);
  overflow: hidden;
}

.tech-panel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 38%;
  border-radius: 50% 50% 100% 100% / 0 0 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.tech-panel > * { position: relative; z-index: 1; }

.tech-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

/* 位于 .tech-panel（含 backdrop-filter）内部，故此处不再叠加滤镜（避免嵌套相乘） */
.tech-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  font-size: 20px;
  line-height: 1;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22);
  border-radius: 50%;
  transition: background var(--dur-fast) var(--ease);
}

.tech-btn:hover {
  background: rgba(94, 234, 212, 0.28);
}

.tech-progress {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: rgba(226, 232, 240, 0.72);
}

.tech-slides {
  position: relative;
}

.tech-slide {
  display: none;
  grid-template-columns: 1.35fr 0.65fr;
  gap: var(--sp-8);
  align-items: center;
}

.tech-slide.is-active {
  display: grid;
  animation: techFade var(--dur-slow) var(--ease);
}

@keyframes techFade {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.tech-kicker {
  display: inline-block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: #5eead4;
}

.tech-slide-text h3 {
  font-size: var(--fs-2xl);
  margin-bottom: var(--sp-3);
  color: #fff;
}

.tech-desc {
  margin-bottom: var(--sp-5);
  font-size: var(--fs-base);
  line-height: var(--lh-snug);
}

.tech-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-4);
}

/* 深色玻璃内的内层面板 */
.tech-point {
  padding: var(--sp-4);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
}

.tech-point strong {
  display: block;
  margin-bottom: 4px;
  font-size: var(--fs-base);
  color: #fff;
}

.tech-point p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.6;
}

.tech-case {
  margin-top: var(--sp-5);
  padding: var(--sp-5);
  background: rgba(94, 234, 212, 0.1);
  border: 1px solid rgba(94, 234, 212, 0.22);
  border-left: 3px solid #5eead4;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.tech-case h4 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-base);
  color: #fff;
}

.tech-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

.tech-metrics span {
  padding: 4px 10px;
  font-size: var(--fs-xs);
  color: #5eead4;
  background: rgba(94, 234, 212, 0.14);
  border: 1px solid rgba(94, 234, 212, 0.24);
  border-radius: var(--radius-full);
}

.tech-case p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.tech-slide-visual {
  display: grid;
  place-items: center;
  gap: var(--sp-4);
}

.tech-orb {
  display: grid;
  place-items: center;
  gap: var(--sp-2);
  width: 100%;
  aspect-ratio: 1;
  max-width: 220px;
  color: #5eead4;
  background:
    radial-gradient(circle at 32% 28%, rgba(255, 255, 255, 0.22), transparent 55%),
    linear-gradient(150deg, rgba(15, 118, 110, 0.55), rgba(37, 99, 235, 0.35));
  border: 1px solid rgba(94, 234, 212, 0.35);
  border-radius: 50%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.tech-orb-no {
  font-family: var(--font-mono);
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: #fff;
}

.tech-orb-en {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.78);
}

.tech-orb-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--sp-2);
}

.tech-orb-tags .tag {
  color: rgba(226, 232, 240, 0.85);
  background: rgba(255, 255, 255, 0.08);
}

/* =========================================================
   Practice
   ========================================================= */
.practice-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-5);
  margin-bottom: var(--sp-12);
}

/* 外层玻璃 */
.practice-metric {
  position: relative;
  padding: var(--sp-6);
  text-align: center;
  overflow: hidden;
}

.practice-metric::before {
  content: "";
  position: absolute;
  top: 0;
  left: 12%;
  right: 12%;
  height: 40%;
  border-radius: 50% 50% 100% 100% / 0 0 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.practice-metric > * { position: relative; z-index: 1; }

.practice-metric-value {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  margin-bottom: var(--sp-2);
}

.practice-metric-value strong {
  font-size: var(--fs-3xl);
  font-weight: 800;
  color: var(--brand);
  letter-spacing: -0.02em;
}

.practice-metric-value span {
  font-size: var(--fs-sm);
  color: var(--ink-500);
}

.practice-metric-label {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--ink-800);
}

.highlight-card {
  position: relative;
  padding: var(--sp-5);
}

.highlight-card > * { position: relative; z-index: 1; }

.highlight-card h4 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-base);
}

.highlight-card p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.timeline {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--sp-5);
  margin-top: var(--sp-12);
  padding-top: var(--sp-6);
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), rgba(15, 118, 110, 0.15));
}

.timeline-item {
  position: relative;
}

.timeline-dot {
  position: absolute;
  top: calc(-1 * var(--sp-6) - 6px);
  left: 0;
  width: 14px;
  height: 14px;
  background: #fff;
  border: 3px solid var(--brand);
  border-radius: 50%;
}

.timeline-date {
  display: inline-block;
  margin-bottom: var(--sp-2);
  padding: 3px 10px;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--brand);
  background: rgba(213, 242, 238, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.8);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-full);
}

.timeline-body h4 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-base);
}

.timeline-body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: var(--ink-600);
}

/* =========================================================
   Roadmap
   ========================================================= */
.phase-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: var(--sp-6);
  transition: transform var(--dur-base) var(--ease);
}

.phase-card:hover { transform: translateY(-3px); }

.phase-card > * { position: relative; z-index: 1; }

.phase-head {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.phase-no {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: #fff;
  background: linear-gradient(150deg, var(--brand), #0e9488);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.32),
    0 4px 12px rgba(15, 118, 110, 0.28);
  border-radius: var(--radius-sm);
}

.phase-head h3 {
  margin: 0 0 2px;
  font-size: var(--fs-md);
}

.phase-period {
  font-size: var(--fs-xs);
  color: var(--ink-500);
}

.phase-goals {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
}

.phase-goals li {
  display: flex;
  gap: var(--sp-3);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--ink-700);
}

.phase-deliverables {
  margin-top: auto;
  padding-top: var(--sp-4);
  border-top: 1px dashed rgba(148, 163, 184, 0.35);
}

.phase-deliverables-label {
  display: block;
  margin-bottom: var(--sp-3);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-500);
}

.service-block {
  margin-top: var(--sp-16);
}

.service-block-title {
  margin-bottom: var(--sp-6);
  font-size: var(--fs-lg);
  text-align: center;
}

.service-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--sp-4);
}

.service-item {
  position: relative;
  padding: var(--sp-5);
}

.service-item > * { position: relative; z-index: 1; }

.service-index {
  display: block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  color: var(--brand);
}

.service-body h4 {
  margin-bottom: var(--sp-2);
  font-size: var(--fs-base);
}

.service-body p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

/* =========================================================
   Contact
   ========================================================= */
/* 玻璃风格下不再使用实底渐变，保持极光壁纸连续 */
.section-contact {
  background: transparent;
}

.contact-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: var(--sp-10);
  align-items: start;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
}

/* 联系信息项：外层玻璃（与表单容器左右对称） */
.contact-item.glass {
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--radius-md);
}

.contact-item h3 {
  margin-bottom: 4px;
  font-size: var(--fs-sm);
  color: var(--ink-500);
  font-weight: 600;
}

.contact-item p {
  margin: 0;
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--ink-900);
}

/* 表单玻璃容器：比其他卡片更实一些，保证长时间输入的可读性 */
.contact-form-wrap {
  position: relative;
  padding: var(--sp-8);
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid var(--glass-border);
  border-radius: var(--glass-radius);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  backdrop-filter: url(#lg-refraction) blur(18px) saturate(180%);
  box-shadow:
    var(--glass-shadow),
    inset 0 2px 0 var(--glass-hi-top),
    inset 0 0 0 1px var(--glass-hi-ring),
    inset 0 0 40px rgba(255, 255, 255, 0.34);
  overflow: hidden;
}

.contact-form-wrap::before {
  content: "";
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 32%;
  border-radius: 50% 50% 100% 100% / 0 0 100% 100%;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.45), rgba(255, 255, 255, 0));
  pointer-events: none;
}

.contact-form-wrap > * { position: relative; z-index: 1; }

.contact-form h3 {
  margin-bottom: var(--sp-5);
  font-size: var(--fs-lg);
}

.faq {
  max-width: 860px;
  margin: var(--sp-12) auto 0;
}

.faq-item {
  position: relative;
  margin-bottom: var(--sp-3);
  overflow: hidden;
}

.faq-q {
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--ink-800);
  cursor: pointer;
  list-style: none;
}

.faq-q::-webkit-details-marker { display: none; }

.faq-q::after {
  content: "+";
  float: right;
  color: var(--brand);
  font-weight: 700;
}

.faq-item[open] .faq-q::after { content: "−"; }

.faq-a {
  padding: 0 var(--sp-5) var(--sp-5);
}

.faq-a p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--ink-600);
}

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1080px) {
  .hero-grid,
  .framework,
  .contact-grid { grid-template-columns: minmax(0, 1fr); }

  .hero-grid { gap: var(--sp-10); }

  .practice-metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .service-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }

  .tech-slide { grid-template-columns: minmax(0, 1fr); }
  .tech-slide-visual { order: -1; }
  .tech-orb { max-width: 160px; }
}

@media (max-width: 720px) {
  .hero-metrics,
  .stat-strip,
  .practice-metrics,
  .service-list,
  .timeline { grid-template-columns: minmax(0, 1fr); }

  .tech-nav { gap: var(--sp-2); }
  .tech-step { min-width: 132px; }
  .tech-step-line { display: none; }
  .tech-points { grid-template-columns: minmax(0, 1fr); }
  .contact-form-wrap { padding: var(--sp-5); }
}