.security-page .content-shell { width: min(1040px, calc(100% - 34px)); }
.security-intro { display: grid; grid-template-columns: 416px minmax(0, 1fr); justify-content: start; align-items: center; gap: 48px; margin-top: 48px; }
.security-intro > img { width: 416px; height: 283px; object-fit: cover; border-radius: 18px; }
.security-intro > div { box-sizing: border-box; min-width: 0; }
.security-intro h1, .security-section h2 { margin: 0; color: #e2231a; font-size: 36px; line-height: 1.2; font-weight: 700; }
.security-intro h1 { font-size: 36px; line-height: 1.2; }
.security-intro p { margin: 12px 0 0; max-width: none; font-size: 16px; line-height: 1.65; color: var(--muted); }
.security-section { margin-top: 70px; }
.security-tips-section { margin-top: 28px; }
.security-tips-section h2 { font-size: 36px; }
.security-solutions-section { margin-top: 38px; }
.security-solutions-section h2 { margin: 0 0 10px; }
.security-track { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 60px) / 3); gap: 30px; overflow-x: auto; padding: 8px 4px 16px; margin-top: 58px; scroll-snap-type: x mandatory; scrollbar-width: none; }
.security-track::-webkit-scrollbar { display: none; }
.security-track > article { min-width: 0; scroll-snap-align: start; }
.security-track.security-tips { width: 100%; grid-auto-columns: 279px; gap: 20px; margin-top: 18px; }
.security-tip { box-sizing: border-box; display: flex; flex-direction: column; width: 279px; max-width: 279px; min-height: 540px; padding: 22px 23px 17px; border: 1px solid #e2231a; border-bottom-width: 3px; border-radius: 8px; background: #fdf4f4; transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease; }
.security-tip:hover { transform: translateY(-2px); border-color: rgba(218, 41, 28, .3); box-shadow: 0 12px 24px rgba(218, 41, 28, .08); }
.security-tip h3 { display: flex; align-items: center; box-sizing: border-box; flex: 0 0 48px; height: 48px; gap: 10px; margin: 0 0 14px; font-size: 13px; line-height: 16px; font-weight: 700; color: #e2231a; }
.security-tip h3 strong { min-width: 0; font-weight: 700; }
.security-tip h3 img { width: 32px; height: 32px; flex: 0 0 32px; object-fit: contain; }
.security-tip h4 { flex: 0 0 auto; margin: 0 0 8px; font-size: 12px; line-height: 13px; font-weight: 700; color: var(--muted); }
.security-tip p, .security-tip li { font-size: 10px; line-height: 13px; color: var(--muted); }
.security-tip h3 + h4 { box-sizing: border-box; flex: 0 0 26px; height: 26px; margin-bottom: 8px; }
.security-tip h3 + h4 + p { flex: 0 0 auto; min-height: 92px; margin: 0 0 5px; }
.security-tip-photo { display: block; flex: 0 0 134px; width: 100%; height: 134px; object-fit: cover; border-radius: 12px; margin-bottom: 20px; }
.security-tip ul { list-style: none; margin: 0; padding: 0; }
.security-tip li { position: relative; padding-left: 12px; margin: 0; }
.security-tip li::before { content: '✓'; position: absolute; left: 0; }
.security-tip .security-source { flex: 0 0 auto; margin: auto 0 0; color: var(--muted); font-size: 9px; line-height: 11px; }
.security-source strong { font-weight: 700; color: var(--muted); }
.security-arrows { display: flex; justify-content: center; gap: 16px; margin-top: 26px; }
.security-arrows button { padding: 0; width: 44px; height: 44px; border: 0; border-radius: 50%; background: transparent; cursor: pointer; }
.security-arrows img { width: 100%; height: 100%; object-fit: contain; }
.security-arrows button:disabled { opacity: .25; cursor: default; filter: grayscale(1); }
.security-arrows button:hover:not(:disabled) { transform: scale(1.05); }
.security-arrows button:focus-visible, .security-track:focus-visible { outline: 3px solid #da291c; outline-offset: 4px; }
.security-expert { display: flex; flex-direction: column; min-height: 696px; padding: 28px 44px 32px; border: 1px solid #cabfbd; border-radius: 18px; box-shadow: 0 3px 3px #9d8983; background: #fff; }
.security-video-placeholder { width: 100%; aspect-ratio: 1.05; border-radius: 26px; background: #ca6c69; }
.security-expert-profile { display: flex; align-items: center; gap: 12px; margin-top: 42px; }
.security-avatar-placeholder { width: 88px; height: 88px; flex: 0 0 auto; border-radius: 50%; background: #ddd; }
.security-expert h3 { margin: 0; color: #e2231a; font-size: 21px; }
.security-expert-profile p { margin: 0; color: #d48d84; font-size: 16px; }
.security-expert-copy { margin: 40px 0; font-size: 16px; line-height: 1.5; color: var(--muted); }
.security-expert-soon { margin-top: auto; color: #e2231a; font-size: 14px; font-weight: 700; }
.security-solution { box-sizing: border-box; width: 100%; margin: 0; padding: 19px 39px; border: 1px solid #f3958d; border-radius: 8px; background: #fdf4f4; text-align: center; }
.security-solution h3 { color: #e2231a; font-size: 26px; line-height: 1.2; font-weight: 700; margin: 0 0 14px; }
.security-solution p { max-width: none; color: var(--muted); font-size: 18px; line-height: 1.3; font-weight: 500; margin: 0 0 14px; }
.security-solution-button { display: inline-flex; box-sizing: border-box; align-items: center; justify-content: center; width: 178px; max-width: 100%; height: 52px; min-width: 178px; min-height: 52px; padding: 0; border-radius: 999px; background: #DA291C; color: #fff; font-size: 16px; line-height: 1; font-weight: 700; text-decoration: none; box-shadow: 0 10px 22px rgba(175, 39, 47, 0.18); transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease; }
.security-solution-button:hover { background: #AF272F; transform: scale(1.03); box-shadow: 0 16px 30px rgba(175, 39, 47, 0.24); }
.security-solution-button:focus-visible { outline: 2px solid #222; outline-offset: 3px; }
.security-android { margin-top: 32px; }
.security-android h2 { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
.security-android h2 img { width: 165px; height: 53px; flex: 0 0 165px; object-fit: contain; transform: translateY(-5px); }
.security-android-intro { margin: 12px 0 0; max-width: none; color: var(--muted); font-size: 16px; line-height: 1.3; }
.security-android-intro strong { font-weight: 700; }
.security-tools { grid-auto-columns: 360px; gap: 20px; margin-top: 18px; }
.security-tool { box-sizing: border-box; display: flex; flex-direction: column; width: 360px; min-height: 640px; padding: 16px; border: 1px solid #f2e9e7; border-bottom: 5px solid #e2231a; border-radius: 24px; background: #fff; box-shadow: 0 4px 14px #eee8e5; }
.security-tool-tag { display: inline-flex; width: fit-content; max-width: 100%; align-self: flex-start; margin-bottom: 12px; padding: 8px 8px 4px 7px; border: 1px solid #f4bcb6; border-radius: 999px; background: #fff0ee; color: #514746; font-size: 12px; font-weight: 500; line-height: 1.1; }
.security-tool-head { display: grid; grid-template-columns: 60px 1fr; gap: 12px; min-height: 100px; }
.security-tool-icon { display: flex; align-items: center; justify-content: center; width: 60px; height: 60px; border-radius: 12px; background: #fff; box-shadow: 0 3px 5px #ccc; }
.security-tool-icon img { width: 36px; height: 40px; object-fit: contain; transition: transform .18s ease, filter .18s ease; }
.security-tool:hover .security-tool-icon img { transform: scale(1.06); filter: drop-shadow(0 12px 24px rgba(218, 41, 28, .16)); }
.security-tool h3 { margin: 0 0 6px; font-size: 20px; line-height: 1.2; font-weight: 700; color: #e2231a; }
.security-tool p { margin: 0; font-size: 16px; line-height: 1.3; color: var(--muted); }
.security-tool p strong, .security-tool li strong { font-weight: 700; }
.security-tool-head p { color: #e2231a; }
.security-tool ol { list-style: decimal; margin: 8px 0; padding-left: 20px; font-size: 16px; line-height: 1.3; color: var(--muted); }
.security-tool li + li { margin-top: 5px; }
.security-tool-bottom { margin-top: auto; padding-top: 12px; border-top: 1px solid #f2e9e7; text-align: center; }
.security-tool-bottom strong { color: #e2231a; font-size: 20px; font-weight: 700; }
.security-tool .platform-button { margin-top: 8px; }
.security-availability { font-size: 14px; color: var(--muted); margin: 16px 0 0; max-width: none; }
.security-tools { grid-auto-columns: 360px; justify-content: start; }

.android-guide-dialog { box-sizing: border-box; width: min(1680px, calc(100vw - 32px)); max-width: none; max-height: calc(100vh - 32px); padding: 32px; overflow: auto; border: 0; border-radius: 20px; background: #fff; color: #222; box-shadow: 0 18px 60px rgba(0, 0, 0, .28); }
.android-guide-dialog[open] { animation: android-guide-in .22s ease-out both; }
.android-guide-dialog::backdrop { background: rgba(0, 0, 0, .56); backdrop-filter: blur(2px); }
.android-guide-dialog[open]::backdrop { animation: android-guide-backdrop-in .22s ease-out both; }
.android-guide-dialog.is-closing { animation: android-guide-out .18s ease-in both; }
.android-guide-dialog.is-closing::backdrop { animation: android-guide-backdrop-out .18s ease-in both; }
.android-guide-header { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.android-guide-header h2 { margin: 0; color: #e2231a; font-size: 24px; line-height: 1.2; }
.android-guide-close { display: inline-flex; flex: 0 0 42px; align-items: center; justify-content: center; width: 42px; height: 42px; padding: 0; border: 1px solid #e9c7c5; border-radius: 50%; background: #fff; color: #555; font-size: 28px; line-height: 1; cursor: pointer; transition: background-color .18s ease, color .18s ease, transform .18s ease; }
.android-guide-close:hover { transform: rotate(90deg); background: #fff0ee; color: #e2231a; }
.android-guide-close:focus-visible { outline: 3px solid #e2231a; outline-offset: 3px; }
.android-guide-carousel { display: grid; grid-template-columns: 42px minmax(0, 1fr) 42px; align-items: center; gap: 12px; }
.android-guide-steps { display: grid; grid-auto-flow: column; grid-auto-columns: calc((100% - 60px) / 6); gap: 12px; min-width: 0; overflow-x: auto; padding: 4px 4px 16px; scroll-snap-type: x mandatory; scrollbar-width: none; }
.android-guide-steps::-webkit-scrollbar { display: none; }
.android-guide-step { display: flex; min-width: 0; flex-direction: column; overflow: hidden; border: 1px solid #ead7d5; border-bottom: 4px solid #e2231a; border-radius: 10px; background: #fffafa; }
.android-guide-step { scroll-snap-align: start; }
.android-guide-step > img { display: block; width: 100%; height: 340px; padding: 10px 8px 0; object-fit: contain; }
.android-guide-step > p { display: grid; grid-template-columns: 32px 1fr; align-items: start; gap: 9px; margin: 0; padding: 12px; color: #222; font-size: 14px; line-height: 1.3; }
.android-guide-step > p > strong { display: flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 50%; background: #e2231a; color: #fff; font-size: 16px; }
.android-guide-step--label > p { display: flex; min-height: 56px; align-items: center; justify-content: center; padding: 12px; text-align: center; }
.android-guide-step--label > p > span { min-width: min(100%, 150px); padding: 9px 12px; border: 1px solid #e2231a; border-radius: 999px; background: #fff; font-weight: 700; }
.android-guide-arrow { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; padding: 0 0 4px; border: 0; border-radius: 50%; background: #e2231a; color: #fff; font-size: 34px; line-height: 1; cursor: pointer; transition: transform .18s ease, background-color .18s ease; }
.android-guide-arrow:hover:not(:disabled) { transform: scale(1.06); background: #AF272F; }
.android-guide-arrow:disabled { opacity: .28; cursor: default; }
.android-guide-arrow:focus-visible { outline: 3px solid #e2231a; outline-offset: 3px; }
.android-guide-step b { font-weight: 700; }
@keyframes android-guide-in { from { opacity: 0; transform: translateY(12px) scale(.985); } to { opacity: 1; transform: translateY(0) scale(1); } }
@keyframes android-guide-out { from { opacity: 1; transform: translateY(0) scale(1); } to { opacity: 0; transform: translateY(8px) scale(.99); } }
@keyframes android-guide-backdrop-in { from { opacity: 0; } to { opacity: 1; } }
@keyframes android-guide-backdrop-out { from { opacity: 1; } to { opacity: 0; } }

.security-page .related-section { margin-top: 78px; margin-bottom: 60px; }
@media (prefers-reduced-motion: reduce) {
  .security-tip { transition: none; }
  .security-tip:hover { transform: none; }
  .security-tool-icon img { transition: none; }
  .security-tool:hover .security-tool-icon img { transform: none; filter: none; }
  .android-guide-dialog[open], .android-guide-dialog[open]::backdrop, .android-guide-dialog.is-closing, .android-guide-dialog.is-closing::backdrop { animation-duration: .01ms; }
  .android-guide-close { transition: none; }
  .android-guide-close:hover { transform: none; }
}
@media (max-width: 1080px) {
  .security-intro { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 48px; }
  .security-intro > img { width: 100%; height: auto; aspect-ratio: 416 / 283; }
  .security-intro > div { width: auto; height: auto; }
  .security-intro h1, .security-section h2 { font-size: 28px; }
  .security-intro h1, .security-tips-section h2 { font-size: 36px; }
  .security-intro p { font-size: 16px; }
  .security-android-intro { font-size: 18px; }
  .security-track { gap: 20px; grid-auto-columns: calc((100% - 40px) / 3); }
  .security-expert { padding: 24px; min-height: 580px; }
  .security-avatar-placeholder { width: 60px; height: 60px; }
  .security-expert-profile { gap: 8px; }
  .security-expert h3 { font-size: 18px; }
  .security-tools { grid-auto-columns: 320px; }
  .security-tool { width: 320px; }
}
@media (max-width: 1280px) {
  .android-guide-dialog { padding: 24px; }
  .android-guide-steps { grid-auto-columns: minmax(220px, calc((100% - 24px) / 3)); }
}
@media (max-width: 700px) {
  .security-page .content-shell { width: min(100%, calc(100% - 24px)); }
  .security-intro { grid-template-columns: minmax(0, 1fr); gap: 28px; margin-top: 36px; }
  .security-intro > img { width: 100%; height: auto; aspect-ratio: 416 / 283; }
  .security-intro h1 { font-size: 28px; }
  .security-intro p { max-width: none; margin-top: 20px; font-size: 16px; }
  .security-tips-section { margin-top: 44px; }
  .security-section { margin-top: 44px; }
  .security-track { grid-auto-columns: 88%; gap: 16px; margin-top: 28px; }
  .security-expert { min-height: 640px; }
  .security-solutions-section { margin-top: 28px; }
  .security-solution { padding: 19px 12px; }
  .security-tools { grid-auto-columns: 88%; }
  .security-tool { width: 100%; min-height: 520px; padding: 12px; }
  .security-android.content-shell { width: min(100%, calc(100% - 24px)); }
  .android-guide-dialog { width: calc(100vw - 20px); max-height: calc(100vh - 20px); padding: 18px; border-radius: 16px; }
  .android-guide-header { gap: 12px; margin-bottom: 16px; }
  .android-guide-header h2 { font-size: 20px; }
  .android-guide-close { flex-basis: 38px; width: 38px; height: 38px; }
  .android-guide-carousel { grid-template-columns: 32px minmax(0, 1fr) 32px; gap: 6px; }
  .android-guide-steps { grid-auto-columns: minmax(190px, calc((100% - 10px) / 2)); gap: 10px; }
  .android-guide-arrow { width: 32px; height: 32px; font-size: 27px; }
  .android-guide-step > img { height: 260px; padding-inline: 6px; }
  .android-guide-step > p { grid-template-columns: 26px 1fr; gap: 6px; padding: 9px; font-size: 12px; }
  .android-guide-step > p > strong { width: 26px; height: 26px; font-size: 14px; }
  .android-guide-step--label > p { min-height: 50px; }
  .security-page .related-section { margin-top: 48px; margin-bottom: 32px; }
}
@media (max-width: 420px) {
  .android-guide-steps { grid-auto-columns: 100%; }
  .android-guide-step > img { height: 260px; }
}