/* ============================================================
   糖心vlog0 · 全站样式表
   站点根绝对路径资源 /assets/media/ 与 /favicon.ico
   分组：base / layout / components / pages / responsive
   ============================================================ */

/* ========== base ========== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica,
    Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #1f2a33;
  background-color: #f5f6f7;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: #3b82c4;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em;
  line-height: 1.3;
  font-weight: 700;
  color: #1f2a33;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

dl,
dd {
  margin: 0;
}

figure {
  margin: 0;
}

table {
  border-collapse: collapse;
  width: 100%;
}

button {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ========== layout ========== */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #e8eaed;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
  color: #1f2a33;
}

.brand:hover {
  text-decoration: none;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #1f2a33;
  letter-spacing: 0.5px;
}

.brand-slogan {
  font-size: 13px;
  color: #6b7682;
}

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

.site-nav .nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #39434d;
  border-radius: 4px;
  border-bottom: 2px solid transparent;
}

.site-nav .nav-list li a:hover {
  color: #1f2a33;
  text-decoration: none;
  background-color: #f0f2f4;
}

.site-nav .nav-list li a.is-current {
  color: #3b82c4;
  font-weight: 600;
  border-bottom-color: #3b82c4;
  background-color: transparent;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 4px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background-color: #1f2a33;
  border-radius: 2px;
}

.site-main {
  flex: 1;
}

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 56px;
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: #6b7682;
  margin-bottom: 24px;
}

.breadcrumb a {
  color: #3b82c4;
}

.breadcrumb-sep {
  color: #9aa3ad;
}

.breadcrumb-current {
  color: #1f2a33;
}

.page-header {
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: #1f2a33;
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  color: #4a5560;
  max-width: 760px;
}

.site-footer {
  background-color: #ffffff;
  border-top: 1px solid #e8eaed;
  margin-top: auto;
}

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 32px;
}

.footer-col p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0.8em;
}

.footer-brand {
  font-size: 18px !important;
  font-weight: 700;
  color: #1f2a33 !important;
  margin-bottom: 0.5em;
}

.footer-heading {
  font-size: 15px;
  font-weight: 600;
  color: #1f2a33;
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  padding: 3px 0;
  font-size: 14px;
  color: #4a5560;
}

.footer-col a:hover {
  color: #3b82c4;
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid #e8eaed;
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: #6b7682;
}

/* ========== components ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  min-height: 44px;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(31, 42, 51, 0.12);
}

.btn-primary {
  background-color: #3b82c4;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #3472ad;
  color: #ffffff;
}

.btn-secondary {
  background-color: #ffffff;
  color: #1f2a33;
  border: 1px solid #d4d8dc;
}

.btn-secondary:hover {
  border-color: #3b82c4;
  color: #3b82c4;
}

.section-block {
  padding: 48px 24px;
}

.section-block h2 {
  margin-bottom: 12px;
}

.section-link {
  margin-top: 20px;
  font-size: 15px;
}

.section-link a {
  font-weight: 600;
}

.related-links {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 32px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 14px;
}

.related-links-label {
  color: #6b7682;
  font-weight: 600;
}

.related-links-item {
  color: #3b82c4;
}

.related-links-item:hover {
  text-decoration: underline;
}

/* 卡片通用 */
.service-card,
.case-card,
.note-item,
.standard-card,
.link-card,
.entry-card,
.topic-card,
.timeline-step,
.material-col {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover,
.case-card:hover,
.note-item:hover,
.standard-card:hover,
.link-card:hover,
.entry-card:hover,
.topic-card:hover,
.timeline-step:hover,
.material-col:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(31, 42, 51, 0.08);
}

/* 折叠问答 */
.faq-item {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 600;
  color: #1f2a33;
  text-align: left;
  background-color: #ffffff;
}

.faq-question::after {
  content: "+";
  font-size: 22px;
  font-weight: 400;
  color: #3b82c4;
  flex-shrink: 0;
  margin-left: 16px;
  transition: transform 0.2s ease;
}

.faq-question[aria-expanded="true"]::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 20px 16px;
  color: #4a5560;
  font-size: 15px;
}

.faq-answer p {
  margin-bottom: 0.5em;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

/* 图片容器 */
.content-media {
  margin: 24px 0;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.content-media figcaption {
  font-size: 13px;
  color: #6b7682;
  text-align: center;
  padding: 8px 0 0;
}

/* ========== pages ========== */
/* --- 首页 index.html --- */
.hero-section {
  background-color: #ffffff;
  border-bottom: 1px solid #e8eaed;
}

.hero-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 56px;
  align-items: center;
}

.hero-copy h1 {
  font-size: 32px;
  font-weight: 700;
  color: #1f2a33;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: #4a5560;
  margin-bottom: 28px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-keywords {
  font-size: 14px;
  color: #6b7682;
  margin-bottom: 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.service-index {
  background-color: #f5f6f7;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.service-card {
  padding: 28px 24px;
}

.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background-color: #e8f0f8;
  color: #3b82c4;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.service-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.service-card p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 16px;
}

.service-card a {
  font-size: 14px;
  font-weight: 600;
}

.case-highlights {
  background-color: #ffffff;
}

.case-grid-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 28px;
}

.case-card {
  overflow: hidden;
}

.case-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.case-card-wide img {
  height: 260px;
}

.case-card h3 {
  padding: 16px 20px 4px;
  font-size: 18px;
}

.case-card p {
  padding: 0 20px 20px;
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

.cooperation-process {
  background-color: #f5f6f7;
}

.steps-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.step-item {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.step-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 16px rgba(31, 42, 51, 0.08);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #4a9d7a;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.step-item h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

.notes-preview {
  background-color: #ffffff;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 28px;
}

.note-item {
  padding: 24px;
}

.note-item h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.note-item p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 12px;
}

.note-item a {
  font-size: 14px;
  font-weight: 600;
}

.faq-section {
  background-color: #f5f6f7;
}

.faq-section .faq-item {
  max-width: 800px;
}

.cooperation-cta {
  background-color: #ffffff;
  border-top: 1px solid #e8eaed;
  text-align: center;
}

.cooperation-cta p {
  font-size: 17px;
  color: #1f2a33;
  margin-bottom: 20px;
}

/* --- 服务范围 txvlog0/service.html --- */
.service-list {
  margin-bottom: 48px;
}

.service-list h2 {
  margin-bottom: 8px;
}

.service-list > p {
  color: #4a5560;
  margin-bottom: 20px;
}

.service-table-wrap {
  overflow-x: auto;
  margin-bottom: 16px;
}

.service-table {
  min-width: 720px;
  border: 1px solid #e8eaed;
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
}

.service-table th,
.service-table td {
  padding: 14px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid #e8eaed;
  vertical-align: top;
}

.service-table thead th {
  background-color: #f0f2f4;
  font-weight: 600;
  color: #1f2a33;
}

.service-table tbody th {
  background-color: #f8f9fa;
  font-weight: 600;
  color: #1f2a33;
  white-space: nowrap;
}

.service-table tbody tr:last-child th,
.service-table tbody tr:last-child td {
  border-bottom: none;
}

.service-table td {
  color: #4a5560;
}

.delivery-standard {
  margin-bottom: 48px;
}

.delivery-standard h2 {
  margin-bottom: 8px;
}

.delivery-standard > p {
  color: #4a5560;
  margin-bottom: 20px;
}

.standard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.standard-card {
  padding: 24px;
}

.standard-card h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.standard-card p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

.link-card-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.link-card {
  display: block;
  padding: 24px;
  color: inherit;
}

.link-card:hover {
  text-decoration: none;
}

.link-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: #3b82c4;
}

.link-card p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

.service-media {
  margin-top: 32px;
}

.service-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.service-media figcaption {
  font-size: 13px;
  color: #6b7682;
  padding: 8px 0 0;
}

/* --- 项目案例 txvlog0/projects.html --- */
.filter-tags {
  margin-bottom: 32px;
}

.section-title {
  margin-bottom: 16px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-item {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 500;
  color: #39434d;
  background-color: #ffffff;
  border: 1px solid #d4d8dc;
  border-radius: 20px;
  min-height: 40px;
  line-height: 1.4;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.tag-item:hover {
  text-decoration: none;
  border-color: #3b82c4;
  color: #3b82c4;
}

.case-list {
  margin-bottom: 48px;
}

.case-list h2 {
  margin-bottom: 20px;
}

.case-item {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 24px;
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  align-items: center;
}

.case-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 6px;
}

.case-content h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.case-type {
  font-size: 13px;
  color: #4a9d7a;
  font-weight: 600;
  margin-bottom: 8px;
}

.case-content p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 8px;
}

.case-scope {
  font-size: 14px;
  color: #6b7682;
  margin-bottom: 12px;
}

.case-content a {
  font-size: 14px;
  font-weight: 600;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.entry-card {
  display: block;
  padding: 24px;
  color: inherit;
}

.entry-card:hover {
  text-decoration: none;
}

.entry-card h3 {
  font-size: 17px;
  margin-bottom: 8px;
  color: #3b82c4;
}

.entry-card p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

/* --- 创作手记 txvlog0/notes.html --- */
.notes-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 56px;
}

.layout-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

.main-content {
  min-width: 0;
}

.main-content .breadcrumb {
  margin-bottom: 24px;
}

.main-content .page-header {
  margin-bottom: 32px;
}

.note-item {
  display: block;
  padding: 24px;
  margin-bottom: 20px;
}

.note-text h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.note-meta {
  font-size: 13px;
  color: #6b7682;
  margin-bottom: 10px;
}

.note-excerpt {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 12px;
}

.note-link {
  font-size: 14px;
  font-weight: 600;
}

.notes-media {
  margin-top: 24px;
}

.notes-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.notes-media figcaption {
  font-size: 13px;
  color: #6b7682;
  padding: 8px 0 0;
}

.aside-notes {
  position: sticky;
  top: 24px;
}

.aside-title {
  font-size: 18px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e8eaed;
}

.topic-card {
  padding: 20px;
  margin-bottom: 14px;
}

.topic-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.topic-desc {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 10px;
}

.topic-card a {
  font-size: 14px;
  font-weight: 600;
}

.topic-more {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 20px;
}

.topic-more p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 10px;
}

.topic-more a {
  font-size: 14px;
  font-weight: 600;
}

/* --- 合作流程 txvlog0/cooperation.html --- */
.section-heading {
  margin-bottom: 20px;
}

.section-heading h2 {
  margin-bottom: 8px;
}

.section-heading p {
  color: #4a5560;
}

.step-timeline {
  margin-bottom: 48px;
}

.timeline-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.timeline-step {
  padding: 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #c47b4a;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 12px;
}

.timeline-step h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-step > p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 12px;
}

.step-output,
.step-role {
  font-size: 13px;
  color: #4a5560;
  margin-bottom: 8px;
}

.step-output dt,
.step-role dt {
  font-weight: 600;
  color: #1f2a33;
  margin-bottom: 4px;
}

.step-output dd,
.step-role dd {
  line-height: 1.6;
}

.content-media-inline {
  margin-top: 24px;
}

.material-list {
  margin-bottom: 48px;
}

.material-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.material-col {
  padding: 24px;
}

.material-col h3 {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid #e8eaed;
}

.material-items li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 10px;
  line-height: 1.6;
}

.material-items li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #3b82c4;
}

.entry-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.entry-cards .entry-card {
  display: block;
}

/* --- 常见问题 txvlog0/faq.html --- */
.faq-categories {
  margin-bottom: 48px;
}

.faq-categories > .section-title {
  margin-bottom: 16px;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group-title {
  font-size: 18px;
  color: #1f2a33;
  padding-bottom: 10px;
  border-bottom: 2px solid #e8eaed;
  margin-bottom: 16px;
}

.faq-group details.faq-item {
  display: block;
}

.faq-group details.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #1f2a33;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-group details.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-group details.faq-item summary::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: #3b82c4;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-group details.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-group details.faq-item p {
  padding: 0 20px 16px;
  font-size: 15px;
  color: #4a5560;
  margin-bottom: 0;
}

.faq-group details.faq-item p a {
  font-weight: 600;
}

.faq-more-entry {
  margin-bottom: 40px;
}

.faq-more-entry > p {
  color: #4a5560;
  margin-bottom: 16px;
}

.more-links li {
  margin-bottom: 8px;
}

.more-links li a {
  font-size: 15px;
  font-weight: 500;
}

.faq-cta {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 32px;
  text-align: center;
}

.faq-cta p {
  color: #4a5560;
  margin-bottom: 16px;
}

/* --- 服务条款 txvlog0/terms.html --- */
.terms-summary,
.terms-audience,
.terms-body,
.related-entries {
  margin-bottom: 48px;
}

.terms-summary .section-title,
.terms-audience .section-title,
.terms-body .section-title,
.related-entries .section-title {
  margin-bottom: 16px;
}

.terms-summary p,
.terms-audience p {
  color: #4a5560;
  max-width: 800px;
}

.terms-block {
  background-color: #ffffff;
  border: 1px solid #e8eaed;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
}

.terms-block h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

.terms-block p {
  font-size: 14px;
  color: #4a5560;
  margin-bottom: 0;
}

.entry-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.entry-card-grid .entry-card {
  display: block;
  padding: 24px;
}

.entry-card-grid .entry-card h3 {
  color: #3b82c4;
}

.entry-card-grid .entry-card a {
  font-size: 14px;
  font-weight: 600;
  color: #3b82c4;
}

/* --- 404.html --- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  min-height: 60vh;
}

.error-content {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  color: #3b82c4;
  margin-bottom: 8px;
}

.error-content h1 {
  font-size: 24px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: #4a5560;
  margin-bottom: 24px;
}

.error-back {
  display: inline-block;
  padding: 12px 28px;
  background-color: #3b82c4;
  color: #ffffff;
  border-radius: 6px;
  font-weight: 600;
  font-size: 15px;
}

.error-back:hover {
  background-color: #3472ad;
  color: #ffffff;
  text-decoration: none;
}

/* ========== responsive ========== */
@media (max-width: 1024px) {
  .service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

  .entry-grid,
  .entry-cards,
  .entry-card-grid,
  .link-card-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .layout-shell {
    grid-template-columns: 1fr 280px;
    gap: 24px;
  }

  .case-item {
    grid-template-columns: 240px 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 60px;
    padding: 0 16px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 16px;
  }

  .site-nav .nav-list.is-open {
    display: flex;
  }

  .site-nav .nav-list li a {
    padding: 12px 8px;
    border-bottom: 1px solid #f0f2f4;
    border-radius: 0;
  }

  .site-nav .nav-list li a.is-current {
    border-bottom-color: #3b82c4;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .hero-section {
    grid-template-columns: 1fr;
    padding: 40px 16px 32px;
    gap: 24px;
  }

  .hero-copy h1 {
    font-size: 26px;
  }

  .section-block {
    padding: 32px 16px;
  }

  .service-grid,
  .case-grid-main,
  .notes-grid,
  .standard-grid,
  .material-grid {
    grid-template-columns: 1fr;
  }

  .steps-row,
  .timeline-grid {
    grid-template-columns: 1fr;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 16px;
  }

  .inner-main,
  .notes-layout {
    padding: 24px 16px 40px;
  }

  .layout-shell {
    grid-template-columns: 1fr;
  }

  .aside-notes {
    position: static;
    margin-top: 32px;
  }

  .case-item {
    grid-template-columns: 1fr;
  }

  .case-media img {
    height: 180px;
  }

  .entry-grid,
  .entry-cards,
  .entry-card-grid,
  .link-card-list {
    grid-template-columns: 1fr;
  }

  .faq-cta {
    padding: 24px 16px;
  }

  .related-links {
    padding: 12px 16px 24px;
  }

  .page-header {
    margin-bottom: 24px;
  }

  .page-title {
    font-size: 24px;
  }

  .breadcrumb {
    margin-bottom: 16px;
  }
}

@media (max-width: 480px) {
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .service-card,
  .step-item,
  .note-item,
  .standard-card,
  .timeline-step,
  .material-col,
  .terms-block {
    padding: 20px;
  }

  .hero-copy h1 {
    font-size: 24px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .case-card img {
    height: 180px;
  }

  .case-card-wide img {
    height: 200px;
  }

  .faq-question {
    padding: 14px 16px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 16px 14px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .footer-bottom p {
    font-size: 12px;
  }
}